What's the matter? Got sand in your wax?
The main problem with surfing, apart from the fact that it is almost impossible, is that you get sand in your wax, which turns your board into a manually operated belt sander, especially as you duck dive under waves. This is not such a problem in cold places, because you wear a nice long wetsuit. But in warmer spots, your legs/knees with soon resemble a raw souvlaki column. This instructable tells you how to clean the old wax off, and put new stuff on!
Step 1: Start With Clean Board
This board has just been cleaned. There are a number of different ways you can clean the old wax off, but the best way, I think, is to leave it in the sun to let the wax soften, then scrape off with a board scraper (that I lost) or your driver's license (that I haven't lost). The license works better. You can remove the last of the wax by rubbing the board with a rag soaked in turps (turpentine). I've heard that Vaseline also works well for removing wax, but it's not as instant as turps and the fumes don't make you giggle as much as turps.