If you haven't used setting solution on them, gently peel them off and get an aftermarket set... or if you have them raid the spares box....
What scale is the model?
Besides, Trumpeter's kits are forever, and entirely...entirely!.... too expensive, and are nothing like perfect either...
.....you've apparently (from the photos) done a beautiful finish job on the model, if the paints are enamels, they'll take a good soaking in warm water to get them off, if not, then try some scotch transparent tape (the frosted kind) directly on the decal... if that doesn't work try masking tape... avoid the painted areas as much as possible.
Sure it's a lot of work, but treat it like it's getting personal...
With me, I'd be determined, even if it turns out less than perfect, to beat the wretched thing.
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