I had seen those before on modelling sites but they typically colour up spoons so it's hard to tell how well they actually work. These are very good. Not as reflective as the original chrome but more than adequate and the sword is really good. I assume the cuirass/breastplate is a newer one from the 90s onwards. It has a textured surface. Probably best to sand the surface smooth first but this is still really good and will look right at home with the museum.
I'll definitely look at getting some.