Pretty straight forward question. I know cashew laquer is the traditional but I'm assuming any easily accessible stone sealer should be good to go? I recently purchased my first two JNATs when I got a deal on two Ozuku Asagi (not sure that's actually correct) that have some flaws and probably need to be lapped quite a bit or cut into naguras (though as hard as these are i'm not sure they would make good naguras), but they are not yet sealed. Before I start lapping off the stamps and see if I can get a decent finisher out of them I want to make sure I properly seal the sides. I've used thompson on concrete with good results so i'm wondering if it'll work on these?