I have some Dupli-Color 500 degree engine paint. Reading the label, it doesn't say anything about primer. Their web site doesn't mention primer on engines either. What would you suggest? Is this stuff supposed to go directly on the bare metal?

If it doesn't specify a primer I'd just paint it. That's what I've done with my engine painting. (I don't remember the paint brands I've used) Just make sure your block is free of grease/oil and is clean and dry before you start.

As well, you might want to consider hi-temp clear. Autozone sells rattle cans of it & I would think that it would help keep the paint nice longer. Good luck...

KCDC