U can choose not to remove the cover but you need some skill with masking tape and newspaper.
Today I just kauw tim 4 of rims. Used 4 cans of black paint and 3 cans of clear coat.
The black paint can withstand 500C. Its a High Temperature Paint by Duplicolor.
RM 23.50 a can
http://www.duplicolor.com/products/engine.html
Unfortunately, not much color to choose. Saw only black and silver at Midvalley Ace Hardware (Lvl 2). Chevrolet Orange-Red and Black at Ikano Powercenter Ace Hardware.
These are enamel paint. Takes 3 - 4 days to dry. But when it dries! It will harden.
Cheers