Bfg tires letters turn brown

Dicer said
Never used this, Tire Penz I can not see why it would not work......
Tire Paint Pens & Markers | Sidewall Pens | Rubber Tyre Painting | White Wall

Thanks, i see how my new tires hold out.thats looks like a good idea and affordable. For the money tires cost shouldn't have to go thru this.