Ive sanded down the main mast still a bit to do but wanted to ask how to treat some mast corrosion that was under a few fittings
Hi HG. This is a method I've heard of although I've never done it.
Brush a 10% solution of sulphuric acid on the area then scrub with a stiff bristle brush while it's still wet.
Wash area throughly with water and when dry paint with a zinc-chromate primer.
Apparently they use this method on airplanes. So it should be OK for your mast.
Good luck mate.
Select to expand quotesamsturdy said..
Hi HG. This is a method I've heard of although I've never done it.
Brush a 10% solution of sulphuric acid on the area then scrub with a stiff bristle brush while it's still wet.
Wash area throughly with water and when dry paint with a zinc-chromate primer.
Apparently they use this method on airplanes. So it should be OK for your mast.
Good luck mate.
Dam Sam your to late 
But thinking about it Ill sand those two areas down and do that Sam Sturdy
G'day HG
I found these products while researching a way to try to make our club crashboat last a bit longer.It was showing signs of corrosion under the floor.
www.floodaustralia.net/products/anti_corrosion/penetrol-aluminium.php
www.amisales.com.au/index.php
Hope this is of some help to you. By the way I think that you are doing a fantastic job on your boat.
Cheers John
RL28 Pinnaroo, Series 100 Landcruiser, Black GL1800 Goldwing
Select to expand quotesamsturdy said..
Hi HG. This is a method I've heard of although I've never done it.
Brush a 10% solution of sulphuric acid on the area then scrub with a stiff bristle brush while it's still wet.
Wash area throughly with water and when dry paint with a zinc-chromate primer.
Apparently they use this method on airplanes. So it should be OK for your mast.
Good luck mate.
Hydrofluoric acid I believe is the best for ally and as far as I am aware zinc chromate is no longer available to the general public. Too toxic they say.
