Aluminium hull question - 1968 Stacer Fishabout mk 2

[bonnetbum]

Hi guys,
I've got the above mentioned hull.

It's starting to get some pitting and showing it's age.

How much more life can I expect out of a hull of this vintage? Is there anything I can do to prolong life expectancy?

 

[crazy charlie]

Interlux makes a "cold tar expoxy" .I used it on my aluminum hull and it was a great barrier coat.The name if I remember correctly is Bitumastic.This was a very long time ago so Im sure the spelling is not accurate.Gallon cans mixed with a hardener made a plasticlike coating.You can apply it as thin or as thick as you want.Works best on hulls with little to no flex.Highly recommend if it still exists.When buying it I was told that the US parks dept used it on their boats.Charlie