My basic glue is Pleximent (methylene chloride). Its the same thing as IPS Weld-On #3. I used to be able to buy it in qt cans (about a 3-year supply with care) but recently found out it is only sold in gallon cans now. Works great, check out the plastic supplies section of your Yellow pages.
For resins and PE I use CA (both liquid & gell) and for canopies and windows I use Micro Klear.
scottrc
If you can get over to Topeka, check with Globe plastics. They can give you the name and address of the local outlet that can supply you with Pleximent. (I can't remember the name of the local outlet off the top of my head, just remember its out on west 6th street a couple of blocks west of the hospital)