Just be careful you aren't melting albums that are valuable!
agreed! it's best to use ones that are scratched or damaged, and that are of little value. the guys at the used record shops can point you towards the "junk" bin.
as for the temp - lower is better. different albums melt at different rates. try 200* and watch the record. it doesn't have to be totally melted to be flexible enough to work with. if it gets too hot or you leave it in too long it will warp and get all shiny and wrinkly.