Join Date: Jul 2008
Location: Dickinson, Tx. / Somerville, TX
I am not familiar with DYO, but when i think of polyester putty I am thinking Bondo. That's OK for filling in small dents and scratches and very minir holes but I would never use it where any kind of flex and strength is required. Again, I am not familiar with DYO or the damage to your boat.
There is also a liquid ployester resin that is used on fiberglass construction with fiber glass mat or cloth of various designs, but not by itself. This is what is typically used in fiberglass boat construction.
As for durability, if properly applied, it should last at least 50 or 60 years as evidenced by tens of thousands (maybe more) of 1950's and 1960's boats still around today.
What is some of the worse offenders in our environment today that just wont disappear? Glass and plastic! Fiber glass and plastic resin.
Retired woodworker, amongst other things, Sold full time cruising boat and now full time cruising in RV. Currently in Somerville, Tx