Over the past 20+ years I've done the plastic "welding" thing myself on various builds that I felt required additional strength. Particularly useful when I chopped and sectioned a 53 Ford. Regardless of what others may think, this is much stronger than using any type of glue only. I tacked the upper and lower body pieces together first using CA then proceeded to plastic "weld" the seem (fumes are crazy bad though). I find this really useful when doing a load of body work that will require a lot of sanding and handling. It does indeed make the seem very strong, much more so than simply using any glue or even epoxy. Last year I chopped and sectioned a 32 Ford Sedan and DID NOT plastic weld the seems. Used CA only. I found myself being extra delicate with handling and sanding and still managed to crack the body 2-3 times whereas when I did the plastic welding it did not happen at all. Basically if you dont like it or dont want to do it, then dont LOL. But it does work well.