Sealing rusty pinhole(d) fuel tank

[CosmicWanderer]

Hi y'all,

what brand do you recommend that you used to seal the inside tank of ST185 and had good results? Mine has got pinholes and it was really, really rusty. After treating some of the rust with nitric acid (I guess ****** up a bit), poured some water and saw really small bubbles coming out of base of the tank, confirming pinholes.

So any good particular brand you suggest using? Maybe kits that include treating leftover rust too.

Attached is the old fuel pump. Imagine what it was like inside the tank.

Many thanks,
CW.

 

[RedCelicaTRD]

KBS coatings makes a rust converter and sealer product. POR15 also has a tank sealer.