I had planned to make some shoes to adapt the modern aluminium flag poles on out village hall to the cast iron supports from black nylon rod offcuts. The shoes are 6" diameter with a 3" hole in them. I know that black nylon weathers very slowly since the pieces I have used for tests have been stored outside for 3 decades and lost their surface finish.
I had expected to be able to buy nylon rod offcuts but they are a bit thin on the ground however black acetal is available in the right size. I have no idea how well it stands up to UV sunlight and weather though.
It is a real pain to get to these shoes and the old wooden ones have just about rotted away and a couple have fallen out. The poles are still captive but rattle around annoyingly. I am hoping to do a once and forever repair in plastic when the steeplejack is next up there.
The shoe isn't under any load it is basically there as a packer and just supports its own weight.
Any ideas how well acetal/Delrin will stand up to external use?