:-) Paint the back of the dials white, this will show through on the front, making the dials stand out. If there is a backing part, use a smear of gell CA, on this then carefully place the film dials. Use watered down white glue on the front of the dials, to attach the PE dial faces. This is not very secure, however and you can easily knock the PE part off, especially when dry. 2 solutions to this problem; 1, smear gell CA around the edges of the 3 parts. Or 2, use minute dabs of gell CA, in between the dials, on the acetate, this will secure the PE. If there is no backing piece just ignore that step. I would still tend to smear gell CA around the edge of the parts, however I fixed them. I have never had a problem with fogging of the acetate dials :-)
Mal
MAL the MASK
BULLDOG # 6 (President)
BEWARE OF THE FEW
Sappers: First in, last out. (UBIQUE)
It's not the same, better, but not the same.