Wow, it sound like I'm making something major!
The chemical resistance I was wanting is a biological product, a waste product to most of us, it's for a errrr..... toilet seat hinge :-)
I did a search and found that titanium is used for resistance to corrosion in some sewage treatment areas, so I thought I'd try to get some small quantities. Yes I know, overkill, but it could be a fun project and a talking point. Hinges that cost more than the toilet.
I also have some nice sycamore that I'm going to make the seat and cover from as well, cut down in our own garden and slabbed for us by the local tree man.
Now I bet no one guessed that use ehh. ;-)
Steve