If it'll dissipate in a few weeks I won't worry about it. Or I'll just
flip the stones over. My concern is that it'll dry and polymerize as
it would in wood and become semi-permanent. But If I can find a recipe
for stone sealer using tung oil and make the whole thing look even, I
just might try it. That wiki link seems to suggest 1:5 Tung:Naptha.
You don't state where you are, but "weathering" will probably take
care of it within a year, especially if a freeze-thaw cycle is
If you are in ths sun belt, let the UV rays solve the problem.