An alternative to PropSpeed is HawkSpeed. It appears to be the same type of product with significantly easier application requirements and at about half to two thirds the price. I bought it last year from Fisheries Supply in the northwest. I haven't pulled my boat our yet so I can't comment on the effectiveness. Like PropSpeed, the smallest kit will do the prop easily twice, maybe three times. The problem will be how to measure out the product for mixing. I split the cost with a friend and we did both props on the same day. We could have done a third if we had lined up another friend.