Finishing Leather

[tmartin38]

I'm relatively new to leather making and hoping to get some guidance - I want to ensure there is no rub off from dying on the underside of my leather piece (it will be used for a vest) is there a finishing coat I can put on the backside that will prevent this from happening? 

[immiketoo]

Any lacquer finish like neat lac, saddle lac, wyosheen or wood brushing lacquer is about as sealed as you can get.  Buffing excess dye with a piece of sheep wool before finishing will help tremendously.