Would not help raised brown letters. Tried this 3 years ago. Even tried grinding with a Dremel sander did nothing except grind the letters down. This brown bleeds up from the tire carcass, thru the letters and when hitting the outside atmospheric, turns brown like a day old avocado or a peeled apple.

The blue or green protective coating on brand new rwl’s, protects them until this coating is scrubbed off.

As the adage goes: “beauty is only skin deep, ugly goes clear to the bone”.

Using the complete chemistry lab of detailing and cleaning products in my garage,,,it is substantial,,,nothing works on these tires. If something works, you do not own these tires. You have tires manufactured before Michelin got their hamfisted paws on these tires.

From 3 years ago posting on topic

https://board.moparts.org/ubbthreads/ubbthreads.php/ubb/showflat/Number/2161193/Searchpage/1/Main/172528/Words/%2BGoodrich+%2Braised+%2Bwhite+%2Bletter+%2Btires/Search/true/re-bfg-ta.html#Post2161193