I buy this polish at a auto parts chain store.
They have a variety of metal polish’s.
The less expensive ones will work but
require a bit more effort. The You Tube
video’s I watch, that are buy guys in Canada,
often mention Princes Auto. If you have one
near by, or another auto parts chain store,
they will have something much more affordable.
Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.