Hydrocal plaster as body putty (P-39).
Baking soda with superglue (body putty). T-Rex
Tissue paper with superglue. Use to sculpt a 1/144 scale pilot figure and for scale fiberglass on an S-F kitbash to fair parts together.
Portland cement plaster for nose weights. (I forget what this was used in. Model no longer in existence.)
Drafting pencil leads for rocket nose cones.
Brass cartridge cases in various calibers. Rings, fairings, and boxing in openings.
Aluminum arrow shafts. Same as above.