How about a separate Automotive Detailing forum? There's 176 pages of threads in the General Tech forum, that's more than enough content to seperate detailing, paint care, washing, polishing, waxing, general cleaning, & cosmetic questions or topics from general mechanical questions.
Original Suggestion & Request thread:
Request for a Automotive Detailing forum.
*edit*
There was supposed to be a poll but the POS didn't ask me to make one AFTER I check marked add a poll. oh well!