Using a roller to paint two pack paints - Wharram Builders and Friends2024-03-29T15:53:14Zhttp://wharrambuilders.ning.com/forum/topics/using-a-roller-to-paint-two-pack-paints?commentId=2195841%3AComment%3A95812&feed=yes&xn_auth=noOne person uses the roller an…tag:wharrambuilders.ning.com,2013-03-04:2195841:Comment:956642013-03-04T15:14:19.794ZAnn and Neville Clementhttp://wharrambuilders.ning.com/profile/AnnandNevilleClement922
<p>One person uses the roller and another person follows and IMMEDIATELY tips off with the brush using VERY LIGHT pressure. Nev and I tried it and did not learn whatever tricks there are to doing it properly. But most folks do learn so I suggest you make your first try when you paint the INBOARD surfaces of the hulls which will not show as you go along the learning curve. Some paint products are easier to use than others. Best of luck to you! </p>
<p>One person uses the roller and another person follows and IMMEDIATELY tips off with the brush using VERY LIGHT pressure. Nev and I tried it and did not learn whatever tricks there are to doing it properly. But most folks do learn so I suggest you make your first try when you paint the INBOARD surfaces of the hulls which will not show as you go along the learning curve. Some paint products are easier to use than others. Best of luck to you! </p> You're right Galway Bay, old…tag:wharrambuilders.ning.com,2013-03-04:2195841:Comment:956612013-03-04T06:28:13.592ZAlf Bangerthttp://wharrambuilders.ning.com/profile/AlfBangert
<p>You're right Galway Bay, old paint in sound condition only needs a scuff sanding and you can apply the System Three WR-LPU right over it. They also make an epoxy primer that is water based and great below the waterline as prep for any choice of anti-fouling. Compared to that insanely stinky primer from Interlux, this was another revelation, once you try it, you're not likely to ever use solvent based products again.</p>
<p>-Alf</p>
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<p>You're right Galway Bay, old paint in sound condition only needs a scuff sanding and you can apply the System Three WR-LPU right over it. They also make an epoxy primer that is water based and great below the waterline as prep for any choice of anti-fouling. Compared to that insanely stinky primer from Interlux, this was another revelation, once you try it, you're not likely to ever use solvent based products again.</p>
<p>-Alf</p>
<p></p> Sounds like this could be exc…tag:wharrambuilders.ning.com,2013-03-03:2195841:Comment:960012013-03-03T14:07:09.287ZGalway Bayhttp://wharrambuilders.ning.com/profile/GalwayBay
Sounds like this could be excellent on older boats as it is the solvent in the International Paint that prevents it being applied over other topcoat finishes no matter how sound they are.
Sounds like this could be excellent on older boats as it is the solvent in the International Paint that prevents it being applied over other topcoat finishes no matter how sound they are. I'm surprised no one has ment…tag:wharrambuilders.ning.com,2013-03-03:2195841:Comment:956532013-03-03T07:42:18.217ZAlf Bangerthttp://wharrambuilders.ning.com/profile/AlfBangert
<p>I'm surprised no one has mentioned System Three's 2 pack polyurethane. Discovering this was a breakthrough for me, as it is a true cross linking coating that is water based....no fumes! Tipping off with a foam brush works better than any bristle, and with water based there is no breakdown of the foam. The best thing about this paint is that it is self-priming over cured and prepared epoxy; it was specially formulated for this use. Overcoating times are so fast that in most cases I can…</p>
<p>I'm surprised no one has mentioned System Three's 2 pack polyurethane. Discovering this was a breakthrough for me, as it is a true cross linking coating that is water based....no fumes! Tipping off with a foam brush works better than any bristle, and with water based there is no breakdown of the foam. The best thing about this paint is that it is self-priming over cured and prepared epoxy; it was specially formulated for this use. Overcoating times are so fast that in most cases I can get 4 - 5 coats on in one day, hot on hot so it all fuses into a single layer with no need to sand between coats. </p>
<p>-Alf</p> I have recently painted two h…tag:wharrambuilders.ning.com,2013-03-01:2195841:Comment:958122013-03-01T23:30:55.086ZIanhttp://wharrambuilders.ning.com/profile/Ian516
<p>I have recently painted two hulls with International Perfection. The first was done in summer with temps up to 35 degrees or so. I am just finishing the second hull at around 5 degrees to 10 degrees or more. Less than 4 nothing works. If I could choose a temp it would be about 15 degrees, no wind, clear sky etc etc.</p>
<p>My preferred discovered technique is to put on the first two coats with the undercoat, using bodyfiller for dings where discovered, wet on "wet" ie not sanding between.…</p>
<p>I have recently painted two hulls with International Perfection. The first was done in summer with temps up to 35 degrees or so. I am just finishing the second hull at around 5 degrees to 10 degrees or more. Less than 4 nothing works. If I could choose a temp it would be about 15 degrees, no wind, clear sky etc etc.</p>
<p>My preferred discovered technique is to put on the first two coats with the undercoat, using bodyfiller for dings where discovered, wet on "wet" ie not sanding between. Then I wetsand with 300 to 400 grit and apply a further two or three coats, the last ones thinned more than they say, maybe 10 to 15%.</p>
<p>Having tried just about every application method bar spraying (sorry, aware of too many industrial victims from that) I now only use a thin foam roller (solvent resistant) followed by A FOAM BRUSH (chuck it after a while, they soften up when they absorb the paint).</p>
<p>This is definitely the best finish I have achieved, but even then, it's hard to eliminate the bubbles. Minimal agitation of the mix seems to help. Working the paint after application is a very bad move.</p>
<p>I am adding this here (also elsewhere already) because there seems little info out there on this very difficult method of finishing, which despite it all, gives good results.</p>
<p>You just have to go like **** at it whatever you do!</p>
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<p></p> Some good tips. But to add;
W…tag:wharrambuilders.ning.com,2012-06-05:2195841:Comment:742812012-06-05T15:08:59.510ZDANhttp://wharrambuilders.ning.com/profile/DAN
<p>Some good tips. But to add;</p>
<p>We used International Interthane 990 (industrial marine range) at about GBP45 per 5l. 11 m/sq per litre. Rolls on well with mohair roller (slight stipple to hide defects and joins in separate panels. Also allows very easy touch up) and tip off with good brush cleaned in acetone. Foam rollers put even less paint on and deteriorate quickly when end of roller loads up(waste paint). We always painted out of wind in cooler temp and always thinned, helping in…</p>
<p>Some good tips. But to add;</p>
<p>We used International Interthane 990 (industrial marine range) at about GBP45 per 5l. 11 m/sq per litre. Rolls on well with mohair roller (slight stipple to hide defects and joins in separate panels. Also allows very easy touch up) and tip off with good brush cleaned in acetone. Foam rollers put even less paint on and deteriorate quickly when end of roller loads up(waste paint). We always painted out of wind in cooler temp and always thinned, helping in keeping a wet edge. The tech data sheets say thinning max 5%, but any good spray painter will say more. When we sprayed hulls it was 20% and looks great. No bubbles and happy. Enjoy - but remember a good coat of paint will show up fairing issues. Meet half way, like douglas said 6'.</p> I repainted a Frances 26 with…tag:wharrambuilders.ning.com,2012-05-25:2195841:Comment:738352012-05-25T19:58:11.041ZRobert Hugheshttp://wharrambuilders.ning.com/profile/RobertHughes
<p>I repainted a Frances 26 with 2 pot poly from International. I applied with a short pile roller and had someone following with a clean new high-quality brush to get rid of the bubbles. The brusher needed to follow very close behind me. It worked very well, thanks to a tip from a professional painter. He said you need to thin the paint down a bit with solvent, to get the right consistency. It was years ago now, but as far as I can remember we had to thin it quite a lot more than we…</p>
<p>I repainted a Frances 26 with 2 pot poly from International. I applied with a short pile roller and had someone following with a clean new high-quality brush to get rid of the bubbles. The brusher needed to follow very close behind me. It worked very well, thanks to a tip from a professional painter. He said you need to thin the paint down a bit with solvent, to get the right consistency. It was years ago now, but as far as I can remember we had to thin it quite a lot more than we expected.</p> Why thank you for all the hel…tag:wharrambuilders.ning.com,2012-05-23:2195841:Comment:730422012-05-23T18:04:54.832Zpaul andersonhttp://wharrambuilders.ning.com/profile/paulanderson
<p>Why thank you for all the helpfull replies.</p>
<p>Cheers Paul.</p>
<p>Why thank you for all the helpfull replies.</p>
<p>Cheers Paul.</p> I use a second fine foam roll…tag:wharrambuilders.ning.com,2012-05-23:2195841:Comment:738082012-05-23T06:45:32.455ZCapgeraldohttp://wharrambuilders.ning.com/profile/Capgeraldo
<p>I use a second fine foam roller instead of the paintbrush. With soft pressure I take away the excessive paint, which would cause tears. From time to time I have to roll out on a piece of waste paper or ply or in the area which should be painted next. This job would better be done by a second person when painting big areas. I always try this technique during the first coat, then I am used to it when painting the last coat. <br></br>The time window to use the second roller is not very…</p>
<p>I use a second fine foam roller instead of the paintbrush. With soft pressure I take away the excessive paint, which would cause tears. From time to time I have to roll out on a piece of waste paper or ply or in the area which should be painted next. This job would better be done by a second person when painting big areas. I always try this technique during the first coat, then I am used to it when painting the last coat. <br/>The time window to use the second roller is not very long(depending on temperature) and it starts a short while after spreading out the paint with the first roller. When waiting to long you will get a skin like an orange. which sometimes is useful when the underground work is not too smooth and you want to cover this.</p>
<p>The paint will be sanded with 280-320 paper before bringing up the last coat. The surface should be well cleaned.<br/> Before I start painting I sift the 2 pack stuff.</p> FYI:
The two part paint whic…tag:wharrambuilders.ning.com,2012-05-22:2195841:Comment:737742012-05-22T18:01:21.539Zdoug nisbethttp://wharrambuilders.ning.com/profile/dougnisbet
<p>FYI:</p>
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<p>The two part paint which is Linear Polyurethane has "Isocyanate" in it! Methyl Isocyanate is what is still kill and causing birth defects in Bophol, India. When you spray it, it WILL go transderm and get in your body even without breathing it. You need a full moon suit, a full hood with a seperate air supply and lots of ventilation. </p>
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<p>Auto body shops in California have spray booths that cost $100,000.00 ! ! ! ! Uh, I don't spray boats any more . .…</p>
<p>FYI:</p>
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<p>The two part paint which is Linear Polyurethane has "Isocyanate" in it! Methyl Isocyanate is what is still kill and causing birth defects in Bophol, India. When you spray it, it WILL go transderm and get in your body even without breathing it. You need a full moon suit, a full hood with a seperate air supply and lots of ventilation. </p>
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<p>Auto body shops in California have spray booths that cost $100,000.00 ! ! ! ! Uh, I don't spray boats any more . . .</p>
<p>When rolling and tiping out, you'll still burn through carbon filters; one to two sets/day. Of course, if you don't want to spend the money on filters, just drink a 6-pack after painting to get some of the solvent out of your system like we did in the old days of pushing glass. </p>
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<p>On a positive note, using a really good brush (varnish brush) will give you the best finish. Also, if you have to do repairs down the line, you CAN reproduce the finish. This isn't so true with the spray applied finish. Remenber the "Six Foot Rule": If it looks good from 6' away, its perfect! I thank GOD that I'm 6'2" . . .</p>
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<p>Cheers, douglas</p>