I think if opening up an Interior forum it would get a decent amount of "play". The reason I brought it up was because "appearance" to me is more or less about how a vehicle looks (exterior, wheels, tinting, paint color, shadow lining, lowered, headlight upgrades, tailight upgrades, removal of roundels, ground effects, carbon hoods, fiberglass components, wings, lips, etc, etc)...
An interior forum would surely separate such tech related threads from "appearance" such as:
headliner R&R
sunroof R&R
window motor R&R
sunroof motor R&R
seat R&R
carpet R&R
convertible top R&R
stereo/audio/radar detector R&R
upholstery R&R
seat fixes
carpet dying
carpet cleaning
dash fixes
dash R&R
heater core R&R
blower motor R&R
HVAC control issues
speedo upgrades (cluster overlays)
speedo R&R
speedo repairs
dash illumination/bulb replacement
OBC upgrades, fixes, mods, light bar, etc
check control module
steering wheel R&R
steering wheel control stalk R&R
headlight switch R&R
upgrade to foglight switch
installation of aftermarket gauges
door card/panel R&R
speaker install/upgrades/removal
convertible top alignment
weather strip fixes or R&R
window switch upgrades or R&R
center console R&R
shifter upgrades
rear view mirror upgrades
rear deck removal (for those w/ coupes & sedans)
rear panel R&R
I could list more, but there's the general idea of what could and can be covered as far as interior tech...

Maybe rename the "Appearance" forum to "Appearance & Body" or "Exterior"... or leave it as is and just insert an Interior forum.
