The very early work that I did has no photos, sorry, just faded memories: there were a couple brass floats that were bad, replaced with plastic. A float valve or two, 5.5 mm fuel lines. I didn’t want to spring for a repaint for a bike that was no good but the bike was good and the repaint was terrific.
A barbecue rotisserie was the preferred means to agitate the tank with hardware inside, I didn’t have one.
Lining the clothes drier with foam and giving your tank a spin was another means, I didn’t do that.
And I haven’t told you that I used a media blaster inside the tank, don’t do it.
I got a bunch of counter sunk wood screws with lots of sharp edges and put them in the tank and shook it until I couldn’t. I emptied the screws and the crud, rinsed till clean, repeated with screws and flush until no more crud.
The paint was badly faded, there were knee rubs on the tank, the side covers were cracked.
Lots here that didnt “survive” , but the tank did.