Internet diagnosis is the worst kind

But it could be the gasket and I'd replace it anyway (they're cheap) and if the one in there looks OK (not soiled by oil) then start looking elsewhere... Not trying to scare you or anything.
GSF: 11047 VALVE COVER GASKET SET G2 16V 2/86 >10/91 9.85
If it's not rubber try and find a rubber one.
Also will a stanley blade scraper surfice for gasket removal?
Yeah, it's what I was going to use