The first step in varnishing a boat is to remove the old product.  Here, you can see how that progress is made in a rainy season. A section of varnish is removed while the forecast cooperates, then detail prep work is done with very sharp scapers, Festool sander and a coat or two of Mar-x-ite is put on to "save" your work before it rains. Mar-x-ite will reconstitute itself so the patches don't show in the final coat. Once this side is done, a coat will be painted down the full length of the cabin and varnish applied within the next 48 hours.