Hey folks, hopefully this doesn't get buried in the shuffle but I had a couple questions about things that I have access to and if anyone has any input. Firstly I can get my hands on ferric oxide powder. I did a few searches without any results as most what came up was about scale. This is a very fine and dry red powder. Also on hand are blanks that go in piping. They are anywhere from 1/4 inch to half inch thick and various sizes. The only marking I see on then is the size. Ex: 2" 150 . Not sure what they're made of and if they could be any good. Thanks in advance!