When they turn brown just break out the lacquer thinner and a rag and wipe them off. The BFG's with all their shortcomings is still the best looking tire for our cars IMHO.
I have BFG, GoodYear, and repro Polyglas RWLT's on my toys that all brown......no paint pen needed, Trichloroethylene, a rag and one's finger, whitens the crap out of the letters
Is there a specific brand that you use ?
How about this one:
https://www.amazon.com/Trichloroethylene-Purity-Solvent-500ml-Model/dp/B013P3OL30/ref=sr_1_6?I've tried everything on my BFG's
Brake cleaner, lacquer thinner, bleach white, goof off - tried all with a rag, paper towel and red scotchbrite.
The best I've been able to achieve was a light tan color.
Turned sh*tty brown again in just a few days, not being driven-just sitting in the garage.
