linda has a great section on crush and strain. it is as it sounds. you get a big pan, cut out the comb, or in your case scrape it off i think, and use something to crush the comb. then you set the comb in something...cheese cloth, paint strainer, etc., over a container (5 gal bucket works) and let the honey drip out of the crushed comb.
the warmer the room, the faster the drip. i usually leave mine 24 hours. then you may met the wax for whatever you want...including rewaxing your plastic foundation.
watch lindas video. it's better than my explanation!