Acrylic and Testor's Liquid Plastic Cement - Model Railroader Magazine

 [snip]I recently tried a trick I picked up from a guy at the club who is a fantastic modeler in my o/p, when using Plexiglas for modeling he uses straight lacquer thinner on a brush. He says it actually welds of fuses the tow pieces together. If I were to guess I would suspect most glues work the same way and are probably all lacquer based.

If your holding pieces parts etc. in your hand until the glue sets up you may what to go to a site like Micormark and check out some of the really nice clamps they have made specifically for model building.

I've also found the mini bar clamps by Kobalt sold in Lowes to be very useful