Thanks for your input this is what I am afraid of as I dnt want it to end up losing too much couler I do have a couple of extra inserts for practicing on before I do attempt to bleach my decent insert I use in the watch I will attempt this tonight and update in the next couple of days thanks for the advice jip7645:It does work, but like I say a lot more comes off than you actually think, you can’t judge it when it’s in the bleach only after the rinse and dry. I’d only rub it lightly and not for too long, or you might get it a lot more washed out than you want it to be