A buddy of mine did it on his B6 S4 and actually came out really nice. He has professional painting experience so it could also be why it came out so well. I know he took a good amount of time just prepping the surface and taping off the surrounding areas to protect from over spray. Laid on a few decently thick coats letting it set up a bit between and finished it off with a semi heavy coat.

If you rush it you can obviously get terrible outcomes so just take your time.

Jason