About the same amount of work as BF, I'm just very slow. Problem was possibly with the product getting frozen or too cold in shipment to me (according to prez) or something wrong with the sprayer, or both. This S/N is permanent permanent permanent dye....I can even apply BF on top of it. Now that I got the matte dark charcoal color I've been after, I'm kind of hesitating making it even darker with BF. The black or nearly black cladding looks really good on the lighter colors and black ones...maybe not so good on my darker Foxfire. Or maybe I'm just afraid of messing something up since I've got it at a stage I really like now. For some reason, I'm hearing this in my brain..."If ain't broken...."