[AJD] need for tank etch?

[Bill Brueck]

I need to seal up a little seepage around the fuel tank outlet fitting on my JD H.  Rather than take the hood off and try to solder this up, I think I'll try the tank sealer products.  I have some of the sealer, but I recall folks on the list speaking of a need to etch the tank first.

What to use?  Do I need to buy a can of etch or is this some common household item I might already have around?

B²
Bill Brueck (brick)
Chatfield, MN, USA

Confusion is a higher state of knowledge than ignorance.