After reading how good it was on here I invested in some Evaporust and it's as good as they say it is, I am impressed.
Cheers
Dennis
I have found that when using Evaporust it seems to help if the item is free of oil & general dirt.
When I did the outer plate on my 400 petcock I sprayed it first with Cillit Bang Kitchen degreaser then using a nylon type soft brush (Not Brass or Wire) just removed the light surface contaminants. Washed the surface with Meths then immersed the item in a shallow container. After an hour or so I would use a small soft paint brush to aggitate the surface - this seems to help speed up the process. Items can be left overnight if needed.
My 400 Petrol Tank did not leak - it had probably three pints of ten year old petrol in it the smell was bad.
It was full of rust and black petrol residue after emptying the liquid. I removed the petcock & broken strainer and bunged up the outlet.
I used some small diameter gravel plus a little Diesel I think it was as a lubricant then began shaking it up and down the tank rotating the tank so the sides and top had the gravel wash treatment. Drained off the dirty Diesel or it might have been petrol can't remember then added fresh liquid and repeated until it looked pretty free of the big lumps of black gunge. Getting all the gravel out took a while!
Once that was done I half filled it with Evaporust leaving it to stand overnight. Repeted next few days with tank on side etc I could not leave it upside down as it would leak out of the fuel cap. The Evaporust takes longer to work as it becommes spent and turns dark brown. I used a fresh Evaporust for the final clean - hard to photograph with my phone but iirc I did post some pics on my 400 project build at link below. I might have added a small amount of glass type florists mini glass diamonds during the Evaporust process - we had some that Wendy used for flower arranging. In the end the tank was pretty clean inside with just a few stain spots visible. Fitted new strainer plus an inline filter - not had any issues since. I did use Wynns Dry Fuel over the winter brimming the tank with SUL. I use Stabil now instead.
