While I think the dying part would be do-able, it may lead to problems during or after skinning. I have personally had poor experience with pre-died cloth intended for things other than SOF kayaks, but none of those instances involved nylon or dying the fabric myself. I know that a couple of folks over at qajaqusa tried to tie-die a kayak skin before sewing onto a kayak frame, but I cannot recall the outcome.

: I went reading about acid dyes this morning. I noticed they mentioned vat
: dying which I assume is aimed at big jobs and industry but it made me
: wonder. Is there a reason not to dye a skin before it is applied to the
: boat? I realize it is probably not practical and would take more dye, just
: curious if there is a dreaw back if you had the means to do that?