Metal tubes stuck together: drilled a hole in one. How to get leverage

You can make watertight trays from flat sheet metal without soldering or riviting.

Take a sheet of metal whose

• length is the length of the finished tray plus two time the height of the sides;
• width is the width of the finished tray plus two time the height of the sides.

Fold the sheet so it ends up looking like this:

You can fold up one side at a time using a piece of wood (maybe 1x2), a bit shorter than the length of the side you are working on, as a bending edge.

Work around the piece, clockwise or counterclockwise.

You will have to work the angle fold in the corners as you move to each successive side. The angle corners will point outward initially. Then you bend them inward toward the short end.

All edges will end up at the height of the sides with no seams. The easiest kind of waterproof.

The next step secret to getting more of this faucet apart are the two slots cut across the cupped part. See the arrows in the following picture.

It looks to me as that the cupped part is threaded down inside the larger diameter part that sticks up from the hole in the sink. There is probably a special tool used to engage these slots to thread the part out. It may be possible to lay a piece of metal bar stock across these slots as a tool. If you do that make sure that it has nice square corners.