i love art questions!!

well, JLW11Hi (love your avatar btw...homestar runner is the greatest!) my high school teacher always used hairspray just cuz it was cheaper. so if you want to go the cheap route, go that way....but i'll warn you. you get what you pay for! hairspray, from what i've heard, will eventually turn it yellow. now remember, that's just what i've heard. i don't know that by experience.
what *I* like to use is D!ck Blick Matte Fixative which, i believe, you can find at Hobby Lobby and, of course, any D!ck Blick store.
really, any kind of spray fixative should work. and you don't HAVE to lay the paper down...i'm sure it would make it easier. but i always hold one corner, hold the can as far away as i can, and spray. of course, ALWAYS test your spray and make sure that it squirts a mist and doesn't squirt a jet (i do know that one by experience!) and you want your surface to look wet when you're done...that always sort of freaked me out at first. but it's ok...it'll dry and look like it's supposed to. don't be afraid to pile on the fixative! the more you get on there, the less it'll smear. once you let the fixative dry a while, lightly touch a heavily shaded area, and if you still get charcoal on your finger, spray it down some more! once you get enough fixative on there, you should get very little to no charcoal residue on your finger.
ummm, let's see...what else?
as others have said, outside is the best place to do it cause anything you use will have some really strong fumes and will be extremely flammable! but if it's too damp or windy out, either wait for a better day, or get some where that you don't mind the fixative getting on (as in furnature, floor, etc.) and very well ventilated!
i believe those are the biggest, most important points. good luck and have fun! :wave: