I can't speak to whether it is going to be acceptable.

However, I have, from time to time, done a little bit of work with Pewter, and it can be polished to mirror shine much like silver. I know this as a fact because I have personally done it with my own hands.

There is a style of finishing pewter called a satin finish that is not polished to a mirror shine. It is like hundreds of thousands of tiny scratches all in the same direction, or crossing at the same angles. It gives a dull finish, and I suppose it is fairly common.

I think mirror finished pewter would look fairly close to silver, and it does develop a patina. Chrome, on the other hand, is a lot brighter and colder looking, and does not develop a patina.

I suggest talking to some of the metal workers of the forum.