[3and2]

I recently purchased a Mookie Wilson bat w/ a PSA LOA according to the certificate it has "smoke damage" on the handle. Does anyone have this type of damage on a bat in their collection? did this smoke damage happen when the player had the bat in his possession? I am slightly confused w/ this imperfection. The auction house said the bat came w/ a psa loa but didn't mention the smoke damage (really pisses me off). However, I really don't notice any smoke damage. I assumed the black was pine tar, bat rack marks, etc. Thanks for your thoughts?