a testimony to the durability of the rustoleum...
i painted a couple of steel shop benches with rustomleum professional about 2 years ago. since then i have dropped, vises on them, steel tool boxes, an assortment of wrenchs and screwdrivers and other tools and not even a scratch. so it holds up well when given the appropriate time to dry. i did put it on full strength and it hasn't peeled yet. there is no reason chemically why the paint when mixed with mineral spirits would react any differently.

now i have a question... probably more of a general paint question, but are any of you doing jambs, as well as trunk and engine bay areas for a complete color change? if so where do you tape off to not get paint transfer from one area to the next.