Rust in tank

[coaster]

For anyone else trying this, B&Q drain cleaner isn't acid based, it doesn't state the ingredients on the bottle, just that it's toxic. It is just caustic soda and at £10.99 bloody expensive and won't touch the rust.
Went to Wicks and spent another £10 for 5 litres of brick cleaner (10% Hydrochloric acid) and tipped that in and agitated the tank at all angles over a period a about 3 hours. That got rid of the majority and also dissolved the fuel tap but I was expecting that tbf.
POR 15 then went in following the excellent large print instructions from Mie Phoenix to the letter.
Will now leave it for several days to dry.

[storkfoot]

Did you clean the tank out properly with water before you put the sealant in?

[fluff34567]

Never had a problem with inline filters tbh inc on 500 and 750 multi cylinder and single cylinder 2 strokes. Simply use one that has a decent chamber size.

[hendy]

Good tip, like the sound of that although just wondering how magnetic is rust

About as magnetic as balsa wood, but lumps of rust usually contain non-oxidised iron particles too and these are what stick to the magnet.

[wrecklessrobbie]

I was amazed how well the brick acid worked.
I found myself setting up a little bath and used it to clean all sorts of nuts and bolts. I then gave them a light covering of grease.
Leave things in it too long though and it dissolves them

[coaster]

Did you clean the tank out properly with water before you put the sealant in?

Had the hose in there for about 5 mins on full blast, then suspended it over the Aga over night. Sealant now installed, it SEEMS very like aluminium silver paint