Another question.... someday I'll be able to give answers...
I did my logo decal on the headstock... the good news, from head-on it looks pretty good:
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The bad news, from an oblique angle, you can see the decal outline...

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This is basically several coats of Minwax spray-on gloss Poly, sanded 320 grit lightly, decal applied, then several more coats of Minwax (still curing, not yet sanded). Clearly one thing I could/should have done was trim the decal closer to the actual script...
If I were working on my model trains, I would have hit the decal with some MicroMark Micro-Sol to help dissolve the label, but that's usually applied on plastic, and I would have also been over-coating with a matte finish to help hide the decal (don't want glossy finish on railroad cars anyway).
I'm not sure what can be done here... either with further treatment now that it's got 4 coats of Minwax over the decal, or if I need to sand it down and re-do the headstock differently. For now it's "good enough" as a first attempt... I can study/learn a bit and try to refinish it later, if only I know the right technique.
Advice?