I agree with the Poor Man's Fiberglass advocates. I have seen Sam's trailer in person and up close and really like the job he did and the overall finish and texture. I think this will be by far the least expensive and most durable way of sealing a teardrop left outside (short of aluminum, and it has it's challenges, and is expensive). Personally, I did Aluminum, but if I were to do it over again, I would seriously consider the Canvas and glue sealing method.
I have a question for the PMF advocates. Does it matter what kind of Fabric you use? I mean, I have heard bed sheets, Muslin, Canvas. But there are "All Cotton" sheets and there are "Blends". Does the Tite-Bond care if you use a Cotton, Blend, or a Polyester material?
And for that matter, has anyone tried something like a Sunbrella fabric, which is polyester. My thoughts are, if one were to use a outdoor fabric like sunbrella with a nice print, and simply glue / bond it to the plywood without painting on a topcoat. You would have a weatherproof surface that is fade resistant and might look fabulous. And if it got to dirty, or sun bleached after some many years, you could always prime and paint it. I have a sunbrella umbrella I bought from Costco that stays outside year round, and it still looks good after 5 or 6 years. I realize Sunbrella is expensive and it may be defeating the purpose of doing a PMF sealing, but there are generic "sunbrella-like" fabrics out there on ebay that can be affordable. And a tasteful two tone teardrop would look the business, especially behind a Classic two tone Car.
Any opinions.