No. 1, I now have the utmost respect for anyone sandblasting for a living. What a dirty annoying thing to have to do! Should be on dirty jobs with mike rowe. I tried black diamond media 20-40grade and it was to coarse, plugged up my gun. So then I tried the other grade Tractor supply had it was marked 30/60 AND 40/80 (both were checked on the bag????) It was pretty fine but flowed through my nozzle and tank well. IS THERE ANY GRADE IN BETWEEN BY BLACK DIAMOND??? I actually started blending the 2 grades but it still stopped up quite a bit, but it stripped really really well. I went through 8 bags(400lbs) on an area probably 5'x6' (30sf) and that was me recycling what I could gather on a tarp all damn day long! IS THAT A NORMAL QUANTITY TO USE, IT SURE SEEMS LIKE A LOT OF MEDIA???