Sound proofing / deadening

[Kevin H]

Mine is an original tank. I've had it out of the car and peered inside too and the baffles run front to back. The time when I really hear the fuel sloshing around is when I stop, so the baffles wouldn't stop that fuel movement (they would only reduce sideways movement).

I should emphasise the point that all of the horse hair insulation has been removed from my car and I haven't gotten around to replacing it yet. Maybe I should do that first and see if I can still hear it before I go to the expense of trying to deaden the sound!

As for the tank material, I don't think it's aluminium - it seems much too hard - but I don't think it is steel either because it doesn't appear to rust, although my did have a few spots of surface corrosion on the outside, which resulted in white powdery deposits (see poor photo attached). Perhaps it's an aluminium alloy such as used in the aircraft industry?