- Metal plate covered with diamonds that seems to be durable but costs somewhere $60-$120. The durability is kind of unknown for me.
- Flattening stones that run between $20-$80 for mystery synthetic stone. Not sure if need to buy several for each of my stone grits and durability is not guaranteed
I did not like my options and decided to go with my sharpening stone idea. Glass base will never warp and the sandpaper has durability and it is cheap enough (less than $0.25 per sheet) to be replaced frequently as needed.
The rest is history, but yet unfinished.
For this project we used the silicon carbide 60 to 3000 Grit Sandpaper Assortment good for dry/ wet usage and available from amazon.