painting "Goodyear" tires

I use a fine white gel pen. Works like a charm.
Lee

Drybrushing acrylics works well also, especially on the really small letters.

I try to use white chalk, rub it on the lettering of the tires, then take a fine paint brush, and brush off any unwanted chalk, you may have to do it a couple of times, but it looks great, i just used that teqnique on my 67 mustang GT fastback

Try dry brushing with enamels and/or using a magnifine glass.