1:35 SA-2 Guideline decaling nightmare

For stripping off decals that are poorly adhering, masking tape often is a quick fix- it pulls decals up fairly well.

Because of your experience with the first kit, I would try coating them with the decal film.  However, you can test first if you want, to verify that they need it.  Most decal sheets have decals over any printing or design, such as the kit or decal part number.  Cutting out and wetting these areas are a good test of the quality of the decals.

For poorly adhering decals, some other solutions other than future include using decal solvent over the applied decal, or using thinned white glue as an adhesive.

Also, if you do use decal film, do not put it on too thick.  That sometimes increases curling and poor adhesion.

I know the feeling.  I have 2 old sets of decals for my P51D that I am using the best of both sets.  Both sets have decals that have crumbled after I have started to slide them off the sheet. I am surprised that I have the majority of decals on the model. Now the problem is the checkered decals that go on the engine cowling.  Both have tore to the point of not being salvageable.

I knew that I should have made a copy on the computer, but I didn't.  I have had to order a replacement set. 

By the way I got mine from www.spruebrothers.com

I also had issues with the decals conforming to the surronding area even after using Micro Sol on it and peircing the decals to get more solution under the decals.  I will get it done though.

As far as getting off the decals, so many methods in this forum by many people, just pick and choose what will work for you. It all depends I think on type of finish so far on your project.