Was wondering firstly whether anyone has tried getting an older pneumatic pressure tank re-anodised as part of a restoration?
Secondly whether an older scratched barrel could be flexhoned back to bare metal internally then re-anodised... I'm thinking Type III Hardcoat anodising which would add a very hard wear resistant layer over the bare metal?
Apparently the Type III process runs at a much reduced temperature vs the usual Type II anodising and could perhaps also be used to restore older pneumatic guns where the barrel was permanently co-moulded into the handle (Technisub Jaguar, Nemrod Clipper etc) and otherwise non-replaceable.
Quite a good process summary here:
http://www.omwcorp.com/Understanding and Specifying Anodizing.pdf
Buildup on threads could be a potential problem:
Anodizers usually use a rule of thumb that the oxide layer penetrates 50% into the part and builds up 50%. The true percentages, according to most sources, are closer to 67% in and 33% out for the common Type II anodizing, and 50% in and 50% out for Type III, hardcoat anodizing.
Secondly whether an older scratched barrel could be flexhoned back to bare metal internally then re-anodised... I'm thinking Type III Hardcoat anodising which would add a very hard wear resistant layer over the bare metal?
Apparently the Type III process runs at a much reduced temperature vs the usual Type II anodising and could perhaps also be used to restore older pneumatic guns where the barrel was permanently co-moulded into the handle (Technisub Jaguar, Nemrod Clipper etc) and otherwise non-replaceable.
Quite a good process summary here:
http://www.omwcorp.com/Understanding and Specifying Anodizing.pdf
Buildup on threads could be a potential problem:
Anodizers usually use a rule of thumb that the oxide layer penetrates 50% into the part and builds up 50%. The true percentages, according to most sources, are closer to 67% in and 33% out for the common Type II anodizing, and 50% in and 50% out for Type III, hardcoat anodizing.
