Re-Spraying Door with 3 Coats BC/CC already on it

Q

Quazz209

Not sure if this is the right place to post this put figured since it had to do with spraying I would try it.

So here is the background. I have to re-shoot a door for a friend that recently had some scratches repaired. The guy who shot the door previously ended up with the metallic mottled pretty badly and it is very noticeable compared to the other panels. This would normally be a 600 wet, shoot the DBC base and Euro Clear. However I am starting to worry about build thickness and adhesion on this... I have found it currently has 3 BC/CC layers on it. The factory paint, an unknown repair as the 2nd shot, and the currently mottled DBC and 2021 layer that I need to shoot over.

I would really like to avoid having to sand this down but In the back of my mind I feel like taking it down with something like 120-180 DA, Epoxy, 600, and then DBC/Euro is the right thing to do. What do you guys think? I have no reason to believe there are currently any adhesion problems.

The guy who shot it last time is a good painter but I think he was in a hurry and just pushed this one out. Looking for you guys might do? This is a production job...although it is on a lexus so the quality needs to be there.

Thanks
 
If it has 3 paint jobs on it already, that is too much. In my shop, I will involve the customer in the decision making process by giving them information about the consequences of excess film build, the cost to rectify the problem, and of course the lack of warranty if the recommended procedures are not carried out.

Also, the door was refinished for a reason, and the stripping process will likely damage any underlying filler work.

Strip and prime jobs usually cost about what a single stage refinish would cost, then the refinish and blending go on top of that.
 
What would you recommend as the best way to strip this door back down? Would you take it all the way to bare metal before primer and re-finishing? Or is it sufficient to just knock down a few layers and seal it with epoxy?
 
Typically it takes more time to finesse off a few layers of paint than it does to rip it all off with a rotary tool. We use 8", 40 or 80 grit sticky discs on a squishy backing pad with an air grinder for jobs like that, followed by 80 DA.
 
crashtech;2499 said:
Typically it takes more time to finesse off a few layers of paint than it does to rip it all off with a rotary tool. We use 8", 40 or 80 grit sticky discs on a squishy backing pad with an air grinder for jobs like that, followed by 80 DA.
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I might have to give that a try, i always just us a DA locked into grinding, it sure takes time though.
 
Oh, yeah, the air grinder is waay faster, but even with the soft pad (which is key) you have to take care around body lines and all that. We'll actually use several tools including a roloc 50 grit and a Clean 'N' Strip disc before moving to the DA. It's a real time saver. We use the same discs that go on the "Mud Hog" 8" DA, which can actually do a pretty good job of removing paint, too, probably as good or better than the old "DA in grind mode."
 
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