I would think that it would be wise to remove anything from your paint before applying a different sealant on. So in this case, remove the Zaino with SMR and then just begin using Black Fire. You may have to use 2 or more coats of SMR though. Laters.
guess my alzheimers is setting in. getting ready to place an order, so
someone remind me of forum discount please. only one of products I need is meguiars, so everything will help--one of the other sites has a 25% off everything spring sale, but I like buying stuff here.