Any ideas on what would be a better option for putting Pennslyvania boat registration numbers on an inflatable. I have two well made Sea Eagle inflatable boats that are registered and I must number them. I am working on a stencil with 3 inch lettering and my question would be is there a paint I can use that would not be affected by the frequency of inflation and then deflation when done fishing? I have seen guys use a Permanent black marker and am wondering if that is a better option.