I recently bought a large concert poster and wanted some way to hang it up on the wall that was both clean-looking and affordable. I decided to go to Michael's to have the poster mounted on board and shrinkwrapped/laminated in plastic. I couldn't be happier with the result - there are no bubbles or wrinkles, the edges are cut cleanly, it flattened out the rolled poster beautifully, and best of all the plastic is UV-proof... so the colours won't get bleached by the sun over time.
The price was very reasonable as well. I would definitely go to Michael's again to mount other posters for hanging!