A. What are the details of the ceramic wax and vinyl protectant? Or I guess, what are you getting for paying them $2,500? B. Are you saying they're going to extend your engine warranty an extra 84 months on top of the standard 3 year warranty for Yamaha, or I'm assuming it's 84 months total? I'd definitely consider the extended warranty for the outboards and if I were to pick only one, it would definitely be that one. 84 months is 7 years and a lot can happen with outboards in 7 years, even just with your normal routine maintenance. and C. I'm assuming you're buying the 257 Fisherman in your signature, which is what... close to a $200k+ boat? What's the difference in adding another $2,500 extended warranty on the engines? I can definitely see that as money better spent than over the ceramic wax and vinyl protectant... but that's just my opinion. I'm sure someone else will come along soon and give you a better answer than I can but for $2,500 I'd definitely consider the extended engine warranty.