I don't sandblast very much but today I did my truck's trailer hitch and went through 50 pounds of normal play sand. It worked pretty well considering it was a cheap Campbell-Hausfeld siphon-type blaster and I'd heard various comments about siphon units in general. At any rate, I heard once that you can sift the sand through a screen and re-use it. That sounds good rather than tossing 50 pounds of slightly contaminated sand. Making a frame is easy enough, but I have no idea what size/type of screen to use.
Suggestions?
--George