Well I've learnt the danger of welding galvanised coated steel from here.
So I don't like sanding it of either.I did a little experiment after using white vinigar to remove mill scale.
A company told me acid removes the galv coating. Not wanting to use very strong acid.I tried the vinigar.
It worked a treat. As the steel rusted very quickly when I left it outside.
So just a case of nutrilise the acid.then I rinse of with hot water so it drys quick and apply heat with my plumbers flame thrower lol.
I pay 1.99 for 5 ltr of white vinigar from local chinese store.
Thought maybe of use to some
So I don't like sanding it of either.I did a little experiment after using white vinigar to remove mill scale.
A company told me acid removes the galv coating. Not wanting to use very strong acid.I tried the vinigar.
It worked a treat. As the steel rusted very quickly when I left it outside.
So just a case of nutrilise the acid.then I rinse of with hot water so it drys quick and apply heat with my plumbers flame thrower lol.
I pay 1.99 for 5 ltr of white vinigar from local chinese store.
Thought maybe of use to some