Thanks for everyone's input, and for Kate's demonstration. I did some more careful buffing of the brown knife sheath, and it does look better than it did, so hopefully the sealer coat will take it the rest of the way.
One final question if you don't mind in a similar vein I guess...I've had a hard time getting the dye inside the sheaths and holsters and belt loops, so this time I thought I would dye the insides first before sewing them up to get good coverage. I will still want to wet mould these pieces after I've sewn them. If the color bleeds some on the inside, I don't really care; but if it causes me problem with the finish on the outside, then I won't do it this way. Will this be an OK approach? If so, will I want to also go ahead and seal it too, or will that cause problems with the wet moulding once sewn up and assembled?
Thanks again, everyone!