Do it Yourself. Aluminum welding is fun and easy. After just a couple of projects, you’ll have paid for the welding machine and be on your way.
Ok, it’s not magic, but it sure seems like it. John E. Cadotte invented reverse osmosis and nanofiltration chemistry, founded Filmtec in 1977 and died in 2005 at age 80. And now sailors can drink from the oceans and not die. So the next time you raise a glass of RO water. Drink a toast to John.
It’s a lot of steel for just 16 miles, but it’s a more fun to build than I expected.
Every coating job has it’s weaknesses and they will be exacerbated by any deviation from the manufactures recommendations, damage, weather, and time. So do the best you can, and accept that you’ll have to make some repairs. It’s just part of living in a world where work is required to overcome entropy.