I have done it, it's hard to get totally filtered though, I made to bottles(200mg/20ml), and one came out nice and gold with no residue, the second came out yellowish gold with light residue... I injected one ml of each and found that the gold was a pleasant injection and the yellowish gold was a stinging injection.... Don't know what I did wrong, but I filtered many times, twice with a 45um, then 2 times with a 25um....