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look at the parts you're cementing: Styrene, acrylic, PVC... are somewhat similar and respond to solvent cements - Tenax for one... solvent for these contain methylene chloride... Testors, etc are thickened versions of the above... will fill small gaps - or gunk up small details, depending on your skill level (grin) CA adhesives work on CLOSELY mating surfaces of MANY (not all) dissimilar materials - make sure there's no gaps (or look for the newer gap-filling CA) and not all materials respond. CA will work better in tension than in shear - if the parts can slide across each other before gluing, the chances are good tht this joint will fail. don't expect adhesives to work on Polypropylene, Polyetheylene or Delrin- these plastics are engineered to be resistant to attack by acids and solvents... I liken gluing them to using an adhesive on parrafin-- it'll hold for a while, until stress is applied. An excellent source for info on adhesives is "Modern Plastics", a trade publication (is it still McGraw Hill?) whick publishes an annual "Modern Plastics Encyclopedia"
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