This problably one of the most talked-about topics on the Forum so you're in luck!
Use your WEB Browser's FIND or SEARCH feature in the Tool Bar to search the Forum for the work brick. If you don't see a topic that's related to brick AND paint, keep searching. Believe me, there are quite a few on this.
After reading them, if there's more info you need, do post up. And if your post gets 'pushed down' the Forum, just create a new post. My best to ya and hope this helps.