Re: Primer or no primer on chassis parts
Many (most) primers have fillers like talc. Using this sort of primer on a chassis part is a bad idea, because the primer will be softer and weaker than the topcoat, and just make it easier for the topcoat to chip.
More than once I have used a primer under a topcoat, and ended up bead-blasting all the paint off, and re-doing it with just the topcoat. But I have never had a situation where I didn't use a primer, and later regretted it.
Of course, 2-component professional body paints are a totally different story.
As for the Eastwood Chassis Black, I used a lot of it (the "Extreme" version) on most chassis parts, and I used its matching primer too. That primer does not seem to have any talc filler. The Extreme Chassis Black dries hard as rock. You can speed up the curing process by baking the parts at 180 degrees for an hour or so, after letting them air-dry until the solvents have evaporated.
Doug
Doug
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