My name is Dirk, I used to work at a small toolroom in melbourne's east who were working on the 'gliders' range of urethane overmolded alloy forgings. I took over the overmold design for 8 months while the guy joey went to do tool design in queensland. He came back and i eventually got a s**t sandwich. In my research I discovered there is no industry standard for shoe sizes or nail pitching. Farriers a headstrong about what they require and one should not meddle with their opinions, in fact, ignoring their opinions is what caused the almost failure of the venture. Listen to their every word, they are the key to success. Most of the race shoes are forged alloy with a steel toe insert. Avoid the temptation to putting a soft coating of any description!!!! Farriers see those types of shoes as a treatment for lame horses! There is a huge scope for standardising the horseshoe industry but it would need full backing from the biggest names in the business.
These 'gliders' shoes were a team effort of 5 or so small business' and all lost large sums of money by the way of poor marketing and as i mentioned, ignoring the industries requirements.
Might i suggest laser cutting the shoes from 5mm steel plate, make a stamping tool to coin the tip of the shoe and fold over 90 degrees with a nice radii.
Please avoid the soft coatings idea, it's pure poison with the racing fraternity.