I am thinking of replacing some of the decals on my F1 models for full tobacco sponsorship versions. Before I go ahead and order the decals, is it easy to remove the existing decals? I assume it's just a case of wetting the decals to remove?
Depends on how old, the quality of the originals and how well they were applied. Some might flake off, others you might not get off at all. Try Micro Sol to soften them, but be prepared for hassle.
That is especially tricky because you are trying to remove decals from a very confined space without doing any damage to the surrounding area or other markings.
Metal polish (Autosol or similar), a fire, a good film and a blunted cocktail stick.
Take your time, apply minimal pressure, and polish the print away which relaxing in from of the telly. Go too fast or too hard and you'll burn through the paint.