Got 944 in Guards Red. Paint on the sides is OK and will polish out to a reasonable shine; top and hood are entirely berkeleyed up.
This is a track car so strictly speaking it doesn't have to look good. That said, I'd prefer that it not look like it came straight from the junkyard.
My current thinking is to simply do a homebrew paint job on the hood and roof only, in flat black. Or I could get it vinyl wrapped which would give me some graphics options. Though I read that for a decent vinyl wrap job the paint underneath has to be in reasonable shape.
Other thoughts? Anyone with Photoshop feel like knocking out a quick mock up? Here's a base image to use (not mine). http://image.automotive.com/f/features/10402076+soriginal/epcp_0810_03_z+1989_pors...

for the roof/hood/hatch. Then make a German-flag colored racing stripe. (edge it on both sides with a white pinstripe so the black of the flag is separated from the black field of the hood.) The effect would be similar to this upholstry for an italian bike.