I'm having trouble getting decals to stick on action figures. Decals can be a decent alternative to painting, as they take much less skill to apply.
But I find certain edges or corners won't stay put, possibly from touching oils on my fingers, first.
How can I get those stubborn decals to stay? Is there a liquid or adhesive that would work?
The decals are foil-based, so they're essentially waterproof, if that matters.