Got the same problem no garage! got a cover for mine from coveryourcar.co.uk think it was about £170 its a good fit over rear wing and does not seem to damage paintwork always wash and dry car before i put it on.then again some people say they do more harm than good?
there is a thread on this on mlr and the car had been resprayed which caused blistered paint. i have had no problems with my paintwork on my evo using these covers or my last evo for that matter!
yeah years ago,also a good friend of mine had a escort rs turbo under a cover and that was worse than mine,his roof had lifted really bad and a few bits on the boot bonnet wings front bumper,also seen a few posts on the forums im on saying they had paint lift as well,so it can happen even with so called breathable covers.