Yep there is a clear version, i have use black over POR on wishbones, but that's a very different application, where finish maybe not quite so important, having said that it goes on fine even with a brush and smooths out nicely, obviously can't comment on peelability because i didn't take it off :-) , and as you remarked, no keying surface prior to application, in fact that's probably the last thing you would want to do as would make it less peelable, just wash and wipe over with IPA , mask up and spray away :-) you can even get sparkle top coat for it if you want a bit of bling :-)