NAPA is great because they stock alot o the pro grade products and body stuff that crappy tire doesn't. And I gave up on Wally world having anything of quality a while ago. I sorta like going to NAPA too because they know me now, mainly because my dad has been restoring a car and I pick stuff up all the time. The crappy tire nearest me just expanded to become the biggest in the country, so now it has less product than it had before, they decided to sell ATV's, boats, motors, and womens clothing instead of the good products like autosol and things I used to buy there. Sorry for the rant.
I would try a paint mixing joint, and see if they can put it in a spray can for you. Might work. Good luck!