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Originally Posted by cruiserbrett
Matt,
DO NOT leave DP50 un-topcoated for more than a week or so. you will have to re-shoot with DP50 again before you prime with a sandable primer if it goes longer than a week. I had serious adhesion problems with primer since I left it longer than the week. apparently it gets too hard after a week of curing and not alot sticks to it other than another coat of dp50.
looks great! seems like toyota had no ideas of the potential of rust when they designed the FJ45lv, and the grille.
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You are correct on the top coat, DP has a 72 hour window to topcoat to achieve a chemical bond to the substrate. I will not be shooting the topcoat of paint (or primer if it needs it again) for several months on all the body parts that have been sprayed with DP, even the body. In this case you have to sand the surface prior to painting or priming again after the window has past. Normally a scotchbrite pad is sufficient, but each part will have to be gone over. Your not getting the chemical bond that DP was designed to do during that 72 hour spray window, but you will be getting a mechanical bond by sanding it.
It's just the way it has to be? I would prefer to spend a few extra hours several months from just going over everything and scuffing it up. I do NOT want to work with rusty, crusty parts so that's why I get all the parts clean and down to the bare metal and in primer.
On the chassis parts that I sprayed with DP, everything was topcoated with MTK within an hour.
Matt