Hanging posters

[implicate.livejournal.com]

Hey crafters. I wasn't quite sure where would be appropriate to ask this, so hopefully this is okay here! So here's the deal - I have a ton of posters I want to hang up except I have no idea how to go about it.

Here are things I've tried and not really loved:
- tacks, pins, etc
- that putty like stuff-- it leaves grease stains behind
- adhesives (like those 3m picture hanging squares, etc)
- frames -- not cost-efficient in this case

Does anyone have any other good ideas? I'd preferably like to not put holes in them or have the chance of ripping them when removing them later on.

Thanks!