I have white over navy blue tubes on my Revenger (grey rubbing strip in the middle) and used Pro marine Ribshine to clean the white bits yesterday before using 3M Tube conditioner on the white and blue sections. I got stung before when I used it on the blue bits as it seems to take the dye out so specifically didn't touch them yesterday.
Looked great, but then it started to rain so I put cover on overnight. Cover obviously got damp, there must have been some residual Pro Marine left on the white bits which then ran down onto the blue bits and has resulted in some lighter blue patches where the dye appears to have been taken off..!!
I've tried re-cleaning and re-conditioning this morning but the problem is still there.
It is not hugely noticeable (My Dad couldn't even see it!) but I know it is there and I have a feeling it will be more noticeable once the 3M wears off (which leaves a shinier deeper looking finish to the tubes).
So, worst case scenario - are the tubes re-dyeable? Is that how they got their colour originally?