im going to let you guys in on a little secret of mines..
my cousin is a painter and he makes this weird concoction of
paint concealer/gloss thingamajigger spray...
i just ask him to pour some out for me and put it in a spray can
and i'll spray that on the soles...
egzactly 3 coats... let it dry overnight
another 3 coats.... and bam!
it's been working like a charm.
I don't know if it works with regular paint concealer
but i'll try n find out the name of another spray I used to buy
please do I would love to preserve the sole!