killbillvol3

Hello everyone, I bought some yellow biking leathers on ebay but unfortunately, I discovered that the colour comes off when it rains, I have no idea what to do. Is there anything I can buy to keep the colour "fixed" to the leathers? By the way, I've tried to wax them with a protective and waterproof wax, but that didn't help apparently. Thank you in advance for your help, Cheers !