Well anything cool can be done to anything, but the 2 mods you mention above are for a purpose (i.e. to make the SNES do things it wasn't originally meant to do).
You could add led's, spray it, cut out sections........., the possibilities are endless.
I did see a nicely modded snes a while back which had its cartridge slot modded to look like the Wii's; it had a perspex panel and a blue led lighting it up, so the whole of the cartridge slot was blue.
-------------------------
My Collection Pics
Current Counts: -
- NES:298 (238/238 Licensed UK PAL A, 11/11 Unlicensed UK, 49 US/AUS)
- VB:33/33+2NFRs
- N64/64DD:127 (109/244 CIB UK, 8 NTSC, 10/10 64DD)
- SMS:197/277