^ The kicker is that this stuff was intended strictly for oral use only as a work aid but after testing that first 15 mg rock it was clear that the whole bag was going to end up being insufflated. I have the nasal equivalent of a needle fetish. I like the rush as well as not having to worry about having an empty stomach but I think I actually like the burn more than anything. Surprisingly my poor nose seems to be in ok shape, though my sinuses may be a different story. I have been letting it rest over the last year aside from some MXE and the occasional stim.
I know exactly where your coming from, i had the exact same experience with mephedrone when it was pure and legal. That stuff was really corrosive and burned something fierce but the intense rush which followed was well worth it and the burn just became another part of the ritual.
If you have crystally material though you can dissolve it in a mil or two of water and place it on a plate and zap in the microwave till it evaporates and then scrape the residue chem left behind.
I was kinda schocked when this stupid kitchen chemistry actually worked.
We used to do this with very shardy K, it triples in volume and decreases the same in potency.
The end result is a much much finer powder with very little to no burn, i've never seen a chem like it and i imagine it would blow away very easily so got to be careful where you put it. 8)
Bit of a strange thing to do with drugs, as obviously most people prefer strong to weak, but if you know what you have in front of you a larger amount of substance can be easier to divide between multiple people or of the chem is known to be on the strong side it will mitigate over doing it a.l.a HR.
Its pretty handy with K as you can weaken it and make sure any first timers don't go in to hard to fast as can be a problem with strong crystal K (if it even exists anymore

) plus any hard heads can just sniff more as it doesn't burn at all.
We did this one night when myself and a couple friends weren't into getting to messy, so we cooked up a G on a dinner plate and just handed it around all night, it lasted a loooong time and you really get a large amount of powder from a G compared to crystal and we all got wobbly enough. Added bonus was that at the end of the night we inevitably started scraping the plate fiend style to get one more hit as the powder will distribute evenly over the porcelaine.
We looked like a bunch of crack heads scraping out our pipes, except it was funny...not you know a human tragedy.
Anyway i digress,
I do wonder if this process would work with other chems it did with the K, as insufflation is just a much easier, discreet and fun ROA.
I'm thinking along the lines of AMT as its so potent but already powder and MDMA crystal because although its great up the snoz that is like being punched in the face.
*edit* realise i rambled there as i dosed 50mg EPH. again oral. and again to do work, not because its fun...because it really isnt, functional but not fun.