I used heat bleach on a cloth with a cloth to catch any drips and rubbed small areas in a circle came up like new off course smells of bleach a bit at first but soon goes I put my navy blue tonneau through the wash g machine half hour cycle with powder at court like a normal wash same again came up like brand new .for the hood 2 coats of forever black black top amazi.g stuff dyed it jet black then 2 coats of renovo waterproofer its brilliant top looks like new and water just beads of the top really impressed