I haven't tried the Eastwood kit but it looks awfully familiar. In the hobby world there is a paint system made by Spastix. It's a high gloss black base coat and then a chrome coat for a top coat. Both are in rattle cans. I tried it on a plastic spoon.
That is not a metal spoon. It is a white plastic cafeteria spoon with the paint on it. The spoon on the right was clear coated. Unfortunately, the coating is very fragile, and when I tried to topcoat with a clear, almost all of it's "chrome" look turned into a cast aluminum look.
Next I tried to just dip it in epoxy to cover up the chrome.
Better, but still not great.
It looks great at first, but it's fragile, and seems impossible to topcoat with a clear. In all fairness, this chrome is designed to be sprayed INSIDE a clear lexan body shell to create a chrome look from the outside.
Might be cool to make chrome headlight covers!