Fundamental Rockhound products: 1 oz .03 Micron Aluminum Oxide Linde A - Lapidary Rock Polish

Can I use this in the rock tumbler as a 5th stage. The rocks are smooth but dull.

I have used this on opals and I liked the result, but now I'm wondering - will it work to remove scratches from sunglasses?

Is this a powder or paste?

I'm cabbing turquoise and using tin oxide on a cabking. can i mix linde a with the tin? or should i put it on a separate elk hide polish head?ratio?