How do you take wwe figures apart to make customs?

You are new, so let me help you: there is a search function. If you use it, you can find threads that have already been made with the questions you have. For instance, here is an answer to your question about paint:
wfigs.proboards48.com/index.cgi?board=Customs2&action=display&thread=1167105284
It is a short answer, but I have answered that question in a more descriptive matter in other threads.

Another suggestion is to check the FAQ which is stickied at the top of the page. There you will find tutorials on how to do certain things, one of which is take apart figures. Good luck!