Well, I wanted to line my impeller housing, but the impeller is 18" diameter and so needs a longer length of UHMW the 48", more like 62" minimum to do the approach and departure bits. So I tried to "weld" some scrap bits together to see if I can make the length needed without spending a fortune for a full sheet of this stuff.
So far, no joy. I did learn, reading about it, that when heated the UHMW PE will go transparent (you can read news print though it), and when cooled, will go back to opaque white. It should be cooled slowly to avoid internal stresses - probably less important on the thinner 1/8" stuff we are dealing with, but still a good idea. Note that it's not convenient, nor maybe even possible, to cool slowly while clamped up against metal :c).
I'll experiment some more with the welding. I have a thin hot knife that may do the deed. I'll try that first before giving up and making liners for the individual paddle blades.
Great job Irv!!