Originally Posted by 396chevelle
Well, I'm sanding down to metal just because I wanted to see what body work was done previously, and it looks like this would be the 3rd color change also. As for the back panels and the roof of the car. I know what's been done back there so I did'nt want to take it to metal on those panel's. I was always told to prime everytime before you re-paint. I sanded the old paint really good and got it smooth. I was worried that the paint would'nt have very good adhesive or could possible bleed through if I did'nt prime it. If I don't have to it would save me some time. Thanks!
with that many color changes sanding all the paint off would be a good idea but if your not sanding it completely off there's really no need to prime ,if the old paint peels off it'll take the primer off too the primer wont help the old paint stick better ,if its not cracked or peeling and looks straight just sand with 320 and paint or you might find youve opened a big can of worms.on the other hand stripping the car to the metal is the only way to go if you have a lot of time and money...OR you can sand a layer or two of paint off with 180 and use a little primer to fill the scratches.but just sanding the top layer of paint and priming it doesnt do anything but waste time and money and create an unnecessary build up of materials that'll chip easy or even crack later on...
a paint sealer will get the car all one color thats important so theres no thin spots in your paint job that you can see and epoxy makes a great paint sealer when reduced 10-20% , or putting two coats of color on the primer spots can work as a sealer too....paint makes a good sealer too