Thanks all for the comments.
*FingersEddie, you are correct. Even though the manufactures label the kits as 54mm scale, they are not exactly that. It is an inconsistent scale to deal with, which would explain why my latest project, to replace an El Viejo head with a Pegaso doesn't really match well. I've read somewhere that some sculpters interpret 54mm as the height to top of head while others take the measure only up to the eyes. In converting to fraction, most equate it to 1/32, while on at least one occasion I've seen it expressed as 1/30. Anyways, the actual height of the Pegaso figure here is 56mm, but he is crouching, and the standing figure is about 64mm.
* Archangel Shooter, the metallic finish is just the bare white metal buffed to a shine using an emery board - the kind you find in a drug store. It can have two or three grades on it and has a bit of soft cushion to it. To get into the tighter areas, I just cut a piece 1/8 inch wide or so. Before buffing, I do apply a dark wash. The chainmail areas I did drybrush some metallic paint where needed.
Jack