Old guns can have their stocks refinished by utilizing a few materials.
Gun manufacturer Heckler and Koch introduced a civilian semi -automatic version of its popular G3 assault rifle in the 1970’s. It comes in both .308 Winchester and 7.62 millimeter caliber versions, but they basically look the same. Its synthetic stock can be refinished to match just about any need or style preference, with a little hard work and a few different painting materials.
1. Disassemble the gun barrel and the trigger mechanism from the HK 91’s stock, according to manufacturer’s instructions. Remove the synthetic hand grip from the bottom the handle. Clean and oil the metal parts, and set them in a safe place.
2. Sand the synthetic stock parts and the hand grip, lightly, removing any surface scratches and ridges where the synthetic stock was fused together. Fill in any deep scratches or gouges using the filler, and allow this material to set completely before sanding these areas smooth.
3. Clean the synthetic stock parts with a clean cloth and rubbing alcohol. Remove all dust or any other debris. Mask off the barrel bedding area and the butt plate to keep paint from getting on these areas.
4. Mix, thoroughly, the two-part epoxy primer, according to directions. Apply a thin coat to the gun’s stocks and hand grip, taking care not to allow runs or drips. Let this dry, and lightly sand it smooth. Apply a second and/or third coat as necessary, lightly sanding if needed, to give the stock a good base for the paint. Allow these coats to dry before proceeding.
5. Apply a thin coat of the synthetic stock paint, allow it to dry and lightly sand it smooth. Apply a second and/or third coat if necessary, lightly sanding if needed, to give the stock a good coat of paint. Allow these coats to dry before proceeding.
6. Apply a light coat of automotive clear coat to the synthetic pieces, allow it to dry and lightly sand it smooth. Apply more coats of the clear coat, lightly sanding, as necessary, to give the stock a good clear coat to protect the finish. Allow these coats to dry before reassembling the gun.