What I would do, not being a prop expert, would be to contact someone that is. The person I am thinking of is Mark Sholund. He has a business he calls Props 4 U where he takes R/C boat props that are rough castings from the manufacturer and finishes them into usable props. I'll be the first to say they aren't cheap but they are ready to go when you get them and are night and day different from the plastic garbage that comes with a stock boat. That said, they are also much more dangerous since they are sharpened, balanced and polished so they will cut a finger off before you can blink. If you're interested, his website is https://props4u.net/