How Can You Brighten The Dark Gray Stains On Traailers That Haul Dry Cement, I Can Get The Residue Off, But I Can't Seem To Get The Stain Area To Match The Rest Of The Trailer, Any Help!
I am trying to clean and brighten cement hawlers (trailers for dry cement)
I can get the old crusted cement off the trailer, but I can not for the life of me brighten the dark stain (burn) from the cement, The rest of the trailer cleans up good with brightner, but I can't get the dark gray to...