I need to prime one my cars.I need to know what grit
to use.I'm not sure of the process of sanding and priming
a car,Any help would be apreceated sorry can't spell too
good,public schools.
Thanks to all
Pep:rockon: :rockon:

 

Usually the last stage before paint or primer would be a very little, what is called feathering, with a 400 grit sandpaper. Any thing less than that and you will see marks as the paint cures. It does not need to be taken beyond that.

Good luck
Scott

 

ya 400 is a good final grit to use just prior to primer or paint. You may see a few sand marks in the paint if you dont put enough paint on but if its just for primer then thats fine since you will be WET sanding the primer anyway. 400 to wet sand also.

 

I need to remove some rust and flaking
paint,the primer is to keep the rust at bay
until I get it painted this summer.

 

Depending on what you are looking at for rust, you might want to do something different. If it is just surface rust then ya, go ahead sand it down and prime. If it is more than that you might want to go with a product like POR 15 to reverse it and then you will have better luck when you go to paint. Primer won't stop rust and in fact if you leave primer on for too long it will actually rust out underneath. Primer by itself does not like water. The paint and clear are what forms a seal and keeps moisture at bay. You might want to do some more research on this.

Good luck

 

not to sound stupid but whats por?

 

doesnt ppg make a primer called dp-4o? its an epoxy primer that stops the oxidation process i think thats what i put on mine before we shot it