Wanted to note a couple of things that I have experienced. 1st is that my gloss black rolled-on rustoleum experiment (whole car) is incredibly hard after only 2 coats (thinned about 20 percent w/odorless mineral spirits). This car is a project car that sits outside in the direct sunlight (South MS = extreme heat & humidity!). Also the color has NOT faded one bit in over 2 months in the elements (rain, dew, direct sunlight, etc). It remains as dark and glossy as the day I put it on only MUCH harder as time goes on. I've even had several people comment that they like the new paint job - I laugh as I tell them it is only being used temporarily to hold down the rusting until I get time to work on this particular project.

I'm wondering if Exit's problem is that his paint never sees the sunlight and therefore never gets the opportunity to fully cure...