Never used vinegar and don't know if acetate salt is absorb nicely by the body, I think it would be as some people use vinegar with H, HOWEVER, it really is not recomended nor lemon juice ( alot of eye infections and shit caused by lemon).
Anyway, if you use H, then I recomend trying a crack/heroin mix. Used to do them all the time and they are unfucking believable, one of the best hits on the planet!!!
Used citric acid, though.
This is becoming real popular in the UK. Put crack and gear in a spoon, add some citric and some water heat it and it should disolve and clear. Suck it up through a filter and heaven awaits - IT'S MENTAL!!! much better than smoking it with H!!
I will try this in the next couple of days... Im very curous now that Ive read some threads about the "Snowballs" (Crack/H)
cheers, Body...