i've seen it done. These two stupid girls i know named Karen and Vicky i know from highschool. Who've made the career choice of squeegeeing cars on street cornors. Once rang me up and purchased 3 hits of my alienhead blotter that i had.
I watched them take 1.5x1.5 and put them in sterile water sit for 15 minutes while stirring on occassion. Then, they used the blotter paper itself as the micronfilter and bam...
They were in Orbit some roughly... 10-15 minutes after injection with first effects hinted around the 5 minute mark.
i didn't do it, so its not like i could give you a trip report.
greatest moment was when Vicky was like Chris, i want to be scared, put on some scary music.
So i put on Skinny Puppy's song Love in Vein with all of the lights off and at about the 3rd 4th minute
both of them were screaming saying turn on the lights!
So i did and vic ran to the washroom freaking out about how her "ribcage collapsed" karen was telling me that the darkness started to grow red lines all across it and it looked like hell was about to open up in my living room. i said... "Manifest Satan, who me ... naawww" lol
ah c'est la vie.