Good Morning All, need some advice from you painting pro's out there.

Just starting in on my '70 Cutlass Vert, and it's got a terrible primer coat on it from a previous owner. Very rough, bumpy, looks like they sprayed it with way too low pressure. Once you get past that, the adhesion looks pretty good. Blocking this mess is nearly impossible, wondering if using a sander w/ 80 grit to knock the top down, then some high-fill primer to fill in for blocking? I really don't want to strip it clear down, but I don't want problems later on either. Any advice??

 

I think you've answered your question.

Only you can decide where you want to land on the spectrum between "Quick" and "Right."

- Eric

 

Showing a picture would help. But if it has primer on the whole car and body work has been done. Block it out with 180 and a long block (durablock), shaped blocks where needed (stylesticks) Guide coat it before hand then start blocking the guide coat will be just a mist of black satin paint or flat black that when you sand it will show sand scratches left over from filler work like 36 or 80 grit scratche and it will reveal low spots, You will bust through high spots first and those will be easy to see. most primers are applied thick right after body work since they will be blocked down and re primered again the last application of primer is the one that counts. I primed and blocked my car 3 times before I was happy . I also think they may have used a polyester primer kind of like feather fill or slick sand etc. Which is very hard to sand . You don't wat to hit it with the d.a sander as that may creat and uneven finish.

 

Thanks guys, I appreciate the help. I'll keep blocking and see where it goes..