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Old 09-14-2003, 06:19 PM
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Should I Apply Sealer Before Painting???

I am planning for a paint job in a few weeks on a pickup and I am needing some opinions. The truck I am painting has good paint on it but it is faded and there will be a small amount of body work (fiber glass body filler will be used). I am planning on just wet sanding the old paint, (BC/CC), and painting on it. Would everyone agree that a sealer should be applied prior to painting to eliminate the body filler bleed through and ensure better adhesion of the base coat OR, how about a show of hands for those who believe sealer wouldn't be necessary. What color of sealer would one use under navy blue paint ?? Also, is it a good idea to paint your finished body filler with a gloss paint prior to sealing or shooting the base coat to reveal any hidden imperfections (scracthes,humps,swails) ?? All opinions are appreciated. THANKS,,,,,AND GOOD LUCK TO ALL.

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Old 09-14-2003, 06:56 PM's Avatar
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Always use a sealer!, after your body work and priming are done shoot the car with a contrasting color of primer and block sand it off, this will show you any variations in the body work, I like to use darker underbases for dark colors, I think it gives the finish more depth, but I'm an old 35 coat hand sanded lacquer man.
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Old 09-14-2003, 07:37 PM
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You can use PPG K36 primer/sealer. K36 is a fast build primer for smoothing out the body and filling imperfections. It is waterproof when the K201 catalyst is used, so it also functions as a sealer. IMO there is no need to use an expensive epoxy sealer if you prepare the bed surface properly.

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Old 09-15-2003, 07:27 AM
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My hand is raised for sealer vote!!! The last jobs I've done, be it motorcycle tanks or complete jobs or touch-ups have been sealed- MUCH better results!!!
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