I am painting my tartan 30 for the first time. I will be using vc17 and I swear someone told me that they use 2quarts but the chart for the product says I will need a gallon and a half. I dont want to buy any more than I need. I guess it could not hurt to buy a little at a time and just paint till I'm done? Or is a dry edge a problem. Either way if you have a similar size boat and have done this before, please let me know how much paint you use.