[Reuven]

Hi i just bought devilbiss finishline 3 gun with 1.3 and 1.5 tips.
Yesterday i primed the car and what i need to do now before starting to paint?
i sanded the car with 1200 grid ( wet ) then what?
Thanks

[swvalcon]

what are you trying to do? If you sanded car with 1200 then primed that really isn't course enough. 400 wet would have been better. same on sanding before paint. Most of what I see for paint peeling looks to me it was more polished than sanded.Most of these new kids a guy has to work with that call themselves painter get their panties in a wad if you hit it with anything more than 600.

[Reuven]

first i primed it than sanded. I didn't finish sanding yet.
What do u recommend?
1200 is too much?

[tiptopss]

hahhahahaha too much? WOW, the paint will never stick to that, it would peel all off very soon after painting it, Id use no more than 400 grit

[TucsonJay]

I want to make sure you know that the higher the number on sandpaper, the "finer" it is.

These grits are usually used at these stages... depending on what you are doing. (No! you don't have to use them all!)


...for bodywork 36-40-80-150-180 (36 looks like "gravel glued to paper".) :-)

...Blocking out primer to flatten it and create better adhesion 360-400

...sanding paint to add more paint on top 400-600-800

...sanding paint before you buff it out 1000-1200-2000-2500


Each painter... each paint syatem... what you are trying to achieve... and the problems it may cause... will require different grits.

I ALWAYS go for the roughest grit I can use. This flattens the surface better and faster, and gives you better adhesion... as long as you are not creating a future problem from the depth of the scratches.

[Reuven]

i c but i am going to paint with metalic silver so i can't sand the paint ; or can i?

[TucsonJay]

I'm a little confused. It sounds like this is your first time.

Is the car already in primer? If not, then sand with 400 before priming.

If the primer is on now, sand with 400, and then put three coats of silver on top. Clearcoat it before it dries too long. Your paint store can tell you what amount of time you need to allow.... but if you wait too long, then it won't stick well.

You cannot sand the silver, or it will look terrible after you clear coat it.

You need to go to the paint store and talk to the people there. They will tell you how your brand of paint works best.

[Reuven]

U r right. It is the first time.
Problem is my paint store is not helping too much.
I sanded the car with 150 grid than primed it 3 days ago.
I wet sanded the hood with 1200 and thats all. I didn't touch the other parts.
On the primer it is writing that i need to wet sand it with 600-1000 grid.
I don't have too much time for painting the car for now but i am planing to finish priming at friday and painting at saturday in two weeks later from now.
I guess waiting one day for painting is enough. I will paint the car in the morning and i will put lacquer 6-7 hours later.
What do u think?