Re: the dome light- I searched for the correct lens but don’t see it. If you can share the file I’ll see what i can do.Indeed - it's very...not white. I did end up painting my top white-white, but only because the body was going back to factory-original Cygnus, and Cygnus everything is a bit bland...a whiter white at least gave a bit of the two-tone look, and it tricks the eye a bit into the Cygnus looking a bit more tan as well. Cygnus is definitely the way to go with the other colors, though...it's an interesting white for sure.
Your link in 4 takes me to hand lotion...don't use that for paint.
The gutter seems in decent shape, but it really isn't that hard to split it and reattach it either. I think it took me under an hour to redo the 70ish rivets, easy peasy...sometimes you'll spend more than that trying to clean the gutter and glass (top and bottom) while attached. Pick your poison a bit, I suppose.
Headliner was no issue with the gutter on, just need to do some marking and trimming...I think it's more typical to do it after to avoid any paint contamination anyway.
I'd keep the light for it's 40 quirkiness. I probably still have the 3D print STL file from CityRacer (?) if you need a lens...I think that's the one that he has.
EDIT: and definitely go light on the sanding...if you burn through the white gelcoat-type layer, you'll be filling in pinholes in the glass underneath.
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