My first couple barber hones came in.

I've read that after lapping a barber hone(which I understand didn't need to be done...they were in perfect condition.doh) then I'll need to apply some sort of viscous petroleum jelly/lube to the surface and let it sit in a warm area(not the sun) for up to 48rhs. Re-apply if necessary.

Can any of you tell me what you've been using, if it is necessary and why people do it?

Thanks in advance...

Simon