I'm a bit late to the party but...
Nice to see your roll on job came out better than mine. I tried my hood and trunk and couldn't get the results I wanted, though I was trying to do BLACK! as I wanted to avoid the obvious signs of a color change. I too have a 4 door Diamondshwartz
I made the hood/trunk look decent and left it alone until last month when I finally could afford to send it in for paint. I've got a single stage paint job done over the rustoluem so it'll be interesting to see if it causes any problems.
BTW, Azenis = The Shit! I have them on my Miata/racer. I put my e30's daily wheel/tires on it for a week and thought I had worn out every single bushing in the car and broke my steering rack by doing that. Stiff sidewalls + 0 tread squirm makes for some seriously awesome steering response.