slim_boy_fat
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If I hold the tool at arm's length and squint my eyes I should be OK
Depends on how long your arms are.
If I hold the tool at arm's length and squint my eyes I should be OK
Whatever happens I won't be taking any risks
With a basic shape like that I would look to making your own up in allyThe tank is unique to the Marcos,
the different steel may have more to do with the rust than laying up the car over winter then !
Thinking about it many classic cars are laid up over winter, do they suffer the same ?View attachment 124410
The bit sticking up on the corner is not part of the tank
The triangular bit at the bottom of the tank is where most of the rust is, have thought about using vinegar, just pour some in and leave it for a while, also seen you tube video where hydrochloric acid is used, very impressed.
Still need to weld a new filler pipe on so cleaning is still on the cards
Or £525 for alloy one !
Whatever happens I won't be taking any risks
My thoughts exactly or stainlessWith a basic shape like that I would look to making your own up in ally
I did think about that once but the tank still needs some welding doing, the tubular filling pipe has rusted and needs replacing.
I got the price wrong for a new tank they're actually £525 !
Apparently the reason why they rust is because lead free fuel doesn't ' coat ' the inside of the tank which allows rust to form, this is because the cars aren't used enough and are sometimes laid up over winter, or so I hear.
I think I'll go the way of washing it out, good rinsing, fill with water and then cut with air powered tools.
If I hold the tool at arm's length and squint my eyes I should be OK
Think you will find that steel fuel tanks use to be made of Terne steel. This was a lead coated steel and the lead would protect the steel from the rusting. BUT this steel is no longer available . I read up on this as the fuel tank for my Capri is like a cullender and having got about 90% into making a new one (see pics) from mild steel I realized it would rust unless coated . Not sure if HOT zinc dipping might distort it (and would make it difficult to finish weld) so have put that version on a back burner well to one side any way and now looking to make up in ally.
As the Marcos is a kit car then was the fuel tank from a donor car or custom for the Marcos ?
If you post a pic it could be that there is a compatible one from another car that may fit.
Link to some info
https://www.metallurgical-research.org/articles/metal/abs/2005/08/P613/P613.html