Repairing M16 Stocks and Handguards
In the late 1960' or early 1970's there was a supplement issued for an M16A1 Technical Manual (roughly the equivalent of your EMER's, Peter) that was directed at the repair of stocks and handguards. It contained a criteria for repair and instructions and illustrations of the method of repair. The reference section of the manual listed the materials to be used. I no longer have the manual but I'm certain someone in CSP world does. I do recall that after repairing the item was to be sprayed with flat black paint. I don't believe the repair process was utilized very long. It soon became a better option to just replace the damaged item. Those early M16A1 buttstocks are now a collector's item.