Simply paint it, etch and sketch. I never cared for the stencils. I run a Polk a dot special. Cut holes in a card board box and use it to apply the right colors for where you are. I went flat brown to lighter shades. You might have to do the opposite. A guy on the job once said “using it will dark in it”. I live in a place where mud lightens it. Have fun! Who cares what it becomes as long as ducks land on it! My favorite part is when you troll up to the restaurant in an “ugly” boat.