I build skin on frame boats.  The skin is nylon.  I use F80 flexible resin to waterproof the cloth.
I have recently started using a white cloth and a customer wants the cloth coloured.  The colour of the finish does not need to be particularly even.
Problems:
1.  I have been told coloring the cloth may reduce the adhesion of the epoxy and nylon is not great for taking up dye. . . . therefore colour the waterproofing layer.  Is it correct that dyed cloth may reduce the epoxy adhesion.?
2.  I understand that colouring the epoxy should be done with either a purpose mixed pigment or that pigmenting it using solid pigment should be done by mixing the pigment thoroughly with the resin first to ensure there are no lumps/clumps, and then adding the hardener.    Are rare earth pigments okay to use or will they inhibit the epoxy acting as it should?