Automotive Paint Job Went Bad | What’s the Best Grit To Use?? – Autobody Q&A

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You said it’s a single-stage paint job. You don’t have to remove it all. Your single-stage paint can actually be used as a foundational coat, kind of like a primer, kind of like a sealer coat.

If you’re going to be spraying single-stage back on top of it, I would just flatten it out, take all the imperfections, the orange peel out, and get it nice and flat.

I would actually let it dry for a good week, if you have the time let it cure. Then I would take it down with like a 320 grit. 320 grit will get you to where you want to be and then you could spray right over that if it’s a single-stage, 320 to 360.

If you want to go crazy, you can go down to 400. But it’s not necessary to go that fine if you’re spraying single-stage because the paint is so thick so It’s just gonna fill. It fills and it just lays out like gloss so anywhere from 320, 340, or 360, I would say 320 or 340 is a good range.

Cut it down, get the paint and the texture flat, and then you could spray your new single-stage right on top of it.

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So if you want to finish 400 grit dry or wet sand, I usually dry sand it, and then I give it a final rubbing of love by hand – wet sand, because I just feel like wet sanding gives you such a cleaner cut.

Some people say that’s old school but that’s the way I like to do it. A lot of people still do it like that I think it’s cleaner. You can get a better cut, the water glistens over the primer and the body parts and you get to see if there are any imperfections.

The water acts like a clear coat and you’re going to be able to see what it looks like before you even spray your clear coat. They say the best body jobs are finished by hand, not by machine. So, I like to go over especially sentimental builds projects that I like.

I’ll go over the whole car by hand, wet sanding at the very end (that’s just me). You could do a dry sanding but I think with dry sanding, you’re more prone to get pigtails from the sander.

“Pigtails” basically you’re getting caking of the powder of your primer and it’s vibrating. and it’s putting these little pigtail scratch marks in your finished product.

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