This is exactly what I plan to do if I have a little time between now and when I fly out of town in a couple days. I'm just trying to find a clean way to do it without masking parts of the inner walls as well (and without going crazy trying to perfectly mask the gaps)I'd paint it all white first then mask the gaps and do the orange metallic colour last.
I tried to make a silicone coating then cut the pieces up to make some silicone inserts for those gaps, but unfortunately the silicone did not cure correctly. The paint I used wasn't done curing, and caused cure inhibition. :/ Going to scrub it off with a brush and try a few more things.