Hello again all,
I thought you may like to see this part of the frag coil restoration using chemical metal. I must admit I didn't have a lot of confidence that this would work. The pictures show the coil in its corroded state, then I made an interior mould by fitting a plastic 35mm film can over a chisel handle with the aid of masking tape. The can was made a good fit into the frag body with the green insulating tape, then the red tape was applied to leave a gap of roughly the right length to fill the missing aluminium part. After three applications of chem metal, fileing between each, the can was carefully cut off. Then whilst cutting out the bottom of the can from the coil body the expected disaster happened and the thin filler fractured! With the aid of yet more wine, cigarette, and steady held tweezers, the bits were glued back together using araldite. When set I coated the inside with more araldite for added strength, and a couple of coats of matt varnish on the outside. Length ground down to fit, and it's ready for paint. It took all night to do, but I finished just in time to watch the Grand Prix at 0600! I'm rather pleased with the result of this little experiment.
Cheers,
navyman.