Julian,
I hope you drilled some holes in the steel hub to give the epoxy an anchor, so it can't slip on the hub. I always like to see a guy who can figure things out- back 20 years ago when I bought my first Shoptask, a lot of guys in the hot rod community told me I was wasting my time and needed a Bridgeport and a big lathe. I did a tremendous amount of work on that machine, including surfacing chevy heads and valve seat work. Later on a lot of those guys would show up at my garage with some project in hand. If you look in JT's brochure on his website you will see some of my pictures.