I did that. The high gloss exterior urethane from Menards does a great job. However; I found that the spray can is a much lower solid content, and does not fill the pores in the wood, even after multiple coats. I got the 1/2 pint of the same thing in a brush on, (use a good smaller artist brush)put two coats, sand lightly with the fine scotch brite pad, and then follow with a few coats of the spray on. Scotch brite between all coats, & wipe off dust with a rag & naphtha or tack rag. The dust will show as white specs in the finish. If the varnish on the stock was a fast dry, or had a sealer on it, the comb may look a little darker, because the new finish will soak in a little more. You may want to apply a compatible brush on sealer first, that will dry faster so the finish does not soak in and make it darker. Mine looks like factory. After it sets for a few days, you can buff it out with car wax.
