Decals folding on edges

[Wheelhouse]

I found that taking a sponge with the tuft pad on the backside works great for getting rid of the rolling decal edges.
Use it dry and just lightly sand the decal edging. It will be a little dusty, but worth it. After you have taken off the curled edging, lightly sand the main field to look uniform.
Most if the dark coloring will come off due to oxidizing with age and exposure.
This gives a better appearance to the decals. It is not perfect, but it looks cleaner.