This is a great costume and we got the idea when we were in Europe because so many places (including Uffizi gallery in Florence) had entertainers posing as statuary.
It only works if you can get set up and in place before guests arrive. We ended up sitting, without moving, for about 2 1/2 hrs.
We happened to have a metal garden settee which we painted bronze to match our costumes.
The clothes were all from thrift stores. I painted all the clothing with a coat of brush on paint (any color) because I wanted it to get Stiff. Then many coats of spray paint. Everything was painted black first and then bronze. Although hard to get into, it was stiff like I had envisioned. https://amzn.to/37IQk6m, Click Link to Buy (If you make a purchase, As part of Amazon Associate, we earn a small commission (at no extra cost to you). For our faces, I found paintable, hard masks, which I chose instead of face paint because I wanted us to be unrecognizable. They were painted the same as the clothing . https://amzn.to/3iLLETo (CLick Link to buy masks).
It was well worth sitting for a couple of hours, without moving, to see the reactions we got. Some people thought we were real statues at first and then it became a game to see if they could get us to move or at least blink our eyes.
Great Fun!!
First prize!!