When you mention pink wheels, I'll refer you to the "Spirit of VTA" Rule.
"
MOST IMPORTANTLY: If it's not in the rules, and does not encompass the spirit of slower, controlled racing with
realistic looking cars, consider it illegal. This is called the "Spirit of VTA" Rule.... All decisions of the race promoter or track owner are final.
"
emphasis added to "MOST IMPORTANTLY" and "realistic looking".
Pink wheels =
blaahhhh!!
...but, if you must: RIT dye, found in Publix / Kroger, will dye anything. Leave it in a pot you don't plan to EVER use again for food and boil the hell out of it. 20 minutes or more for each piece (depending on plastic type - some are quicker). Do not spill it....
-Drew