Safe decal removal?

I’m trying to remove some bike store decals from my bike - they’re the kind where each letter in the name of the store are individual stickers and they are a BITCH to remove - i scratched for half an hour and got two letters off. Anyone have any good suggestions for a solvent/technique or something that hopefully won’t harm the paint yet allow easy sticker removal?

try acetone-free nail polish remover
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Warm blow dryer and a plastic scraper works well for me.

water based “goof off” it won’t harm the paint
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