Old damaged decals on Interceptor G

Finishing rockets isn't exactly my forte, I'm more of a making-motors kind of guy... Recently I bought a water-damaged Interceptor G kit. Fixed the slightly-warped fins, replaced one body tube. It's lovely; got a coat of flat white primer right now. The decals are self-stick and appear to be mostly in good shape, but there are a few places where they've separated from the backing and a little dirt got onto the adhesive. Advice? Best regards, Terry

I was wondering if maybe denatured alcohol would work? I use it for just about everything, but mostly in the RC world for cleaning sensitive areas on trucks. Seems to dry quickly as well.

I'll give it a try with some scraps. Thanks!