Texas Tech Posted March 7, 2007 Report Share Posted March 7, 2007 So i tried painting some interior plastic pieces. I got some bubbles rising on some places, some shitty shit on other plastic pieces. I Skipped sanding just because i dont have much time and i duno, im an idiot. I know you should sand. In epicenterdesigns' how to it says to wet sand. What exactly is wet sanding? I mean i got a general idea but yea... Would wet sanding the plastic piece make it have a smoother surface as opposed to just sanding, or would they both have the same outcome on the surface of the plastic?. Should i sand by hand or with an electrical sander? Oh i also did not use filler primer because i didnt have any. So i should definetly get some of that. I am looking for a site on where i can buy Du Pont paint and primer and such. But you know, spring break is right around the corner and i can sand down everything, go through all the steps properly, and have some good work. So that is what i am hoping for. Quote Baylor University Accounting Link to comment Share on other sites More sharing options...
sean 371 Posted March 7, 2007 Report Share Posted March 7, 2007 Wet sanding is thoroughly spraying down the piece with water to prevent direct contact with sandpaper, thus allowing you to sand lightly in between paint coats. Don't bother with this until you actually start spraying, it hardly sands anything. But once you start painting, it makes a lot of difference in the smoothness of the finish. Quote A couple links to some box builds: Tahoe Box 1, Tahoe Box 2, Nissan Titan, VW GTI, Mini-Bump, Hummer H2, Ford F-150 My own car builds (current setup --- under construction): Overall Thread, Kickpods, Dash, Back Doors Subwoofer Wall Link to comment Share on other sites More sharing options...
BAGGEDBIRDS.com Posted March 7, 2007 Report Share Posted March 7, 2007 The water will carry the dust away from the surface and keep your sandpaper from clogging and it will last longer. Don't forget the adhesion promoter Quote 1st SMD "System of the Month" Feb. 2007 Zapco Studio 500 (2) Zapco Studio 300X Zapco Studio 204 (2) (2) FI 12ssd's w/ copper coils DLS Iridium Tweeters DLS UR2.5 MidRange FI. N.7 Midbass JL Audio TWK 88 Mechman 370A Elite Alternator Link to comment Share on other sites More sharing options...
kickerman Posted March 7, 2007 Report Share Posted March 7, 2007 wet sanding does not prevent the paper from clogging. u should not have to wet sand between cotes of paint. only wet sand the clear to get a better finish(get out orangepeel ect..). Quote 18" mmats juggernaut rf t10001bd alpine h/u Link to comment Share on other sites More sharing options...
EpicenterDesigns Posted March 7, 2007 Report Share Posted March 7, 2007 On interior plastic pieces and panels, it is recommended to wet sand. Do this by hand on smaller parts and if you use some form of mechanicall sander, use a light grit so you don't heat the plastic up and start melting it. When it starts to melt, more oils rise to the top and you need to sand them down by hand anyways. Wet sanding will help the sand paper stay cleaner longer. It also helps it slide across the surfuse smoother, leaving less sanding marks. Texas tech, you even admitted to skipping steps, so don't be surprised by the results. You didn't have time then, but now you need to go back to square 1. Even more time. If you must use spray can primer, use SEM Filler primers. http://www.sem.ws/product.php?product_id=148 To properly wet sand, use some soapy warm water if possible. It will clean the surface at the same time. I usually keep a bucket of water beside me and use a squirt bottle to keep the paper and surface wet. Quote Building The Best.....Repairing The Rest The bitter after-taste of a poor quality job will last far longer than the sweetness of that cheap price! Link to comment Share on other sites More sharing options...
kickerman Posted March 7, 2007 Report Share Posted March 7, 2007 Wet sanding will help the sand paper stay cleaner longer. It also helps it slide across the surfuse smoother, leaving less sanding marks. it does not keep it cleaner!! Quote 18" mmats juggernaut rf t10001bd alpine h/u Link to comment Share on other sites More sharing options...
EpicenterDesigns Posted March 7, 2007 Report Share Posted March 7, 2007 it does not keep it cleaner!! What does it do then? I do this on almost daily. It keeps the paper cleaner than if it was dry sanding. Quote Building The Best.....Repairing The Rest The bitter after-taste of a poor quality job will last far longer than the sweetness of that cheap price! Link to comment Share on other sites More sharing options...
BAGGEDBIRDS.com Posted March 7, 2007 Report Share Posted March 7, 2007 Kicker - If it doesn't keep the paper clean why use water in your opinion? Some people DO sand in between coats, you don't have to, unless maybe you exceeded the time between coats. You think the really nice paint jobs are only sanded once after the last coat of clear? Please do tell Quote 1st SMD "System of the Month" Feb. 2007 Zapco Studio 500 (2) Zapco Studio 300X Zapco Studio 204 (2) (2) FI 12ssd's w/ copper coils DLS Iridium Tweeters DLS UR2.5 MidRange FI. N.7 Midbass JL Audio TWK 88 Mechman 370A Elite Alternator Link to comment Share on other sites More sharing options...
Texas Tech Posted March 7, 2007 Author Report Share Posted March 7, 2007 I know man, and i know that is why it came out so shitty. Wet sanding is thoroughly spraying down the piece with water to prevent direct contact with sandpaper, thus allowing you to sand lightly in between paint coats. Don't bother with this until you actually start spraying, it hardly sands anything. But once you start painting, it makes a lot of difference in the smoothness of the finish. On EpicenterDesigns' How to it says to wet sand right after you clean the plastic piece off. You wet sand to get the grain out with diiferent grit sandpaper.(80,150, then 220) After the primer is applied then you wetsand lightly with a 220 grit, then a final 400 grit. So according to his How to he says to wetsand even before any spraying. I am going to electrically sand down the pieces to get the paint and primer off, then start from the first step and do it right. Quote Baylor University Accounting Link to comment Share on other sites More sharing options...
Texas Tech Posted March 7, 2007 Author Report Share Posted March 7, 2007 (edited) So i should be SEM Filler Primer, i will try to order some online tonight Does the High Build part in the title of "High Build Primer Surfaces" mean Filler Edited March 7, 2007 by Texas Tech Quote Baylor University Accounting Link to comment Share on other sites More sharing options...
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