Well, after all the welding, I finally got the tender tank onto the frame...

All the details are made from the same 2 mm stainless plate as used for the tank itself. But now, how to get all the hundreds of rivets onto the tank, to get it to look like the full-sized prototype?

Here is a sneaky solution: I'm punching small, 2.5 mm (0.1") holes out of a "iron-on" melamine tape, such as used on shelf edges and other furniture made of chipboard. This tape has a heat-sensitive adhesive on the back...

... so applying the "rivets" onto the tank was a really simple job; I just heated the metal locally with a small propane torch, after which I could place the "rivets" on a scribed line, just by eye - and using tweezers. Any slight misalignment can easily be adjusted while the metal is hot.

In fact. I used this stuff for many other small details, such as hinges and latches on the toolbox doors.

After painting, first with a primer, and then with a semi-matte "official locomotive green" alkyd paint, the tank looks like this. You have to get pretty close to see that the rivets aren't real...