Emery tape, a wire bush, then apply a rust converter.
Let that dry for 24 hours, then paint in there with with a Urathane - I like KBS Rust Seal in Silver.
If it's really bad, you need to do this:
Nissan used very soft oil control rings in the pistons.
These wear first causing oil to be sucked up into the combustion chamber, hence your blue smoke.
Only way to fix it is to rebuild the engine.
Black smoke is an overly rich mixture from those horrible flat top Hitachi's that you CAN'T tune out.
I suggest fitting 240Z Hitachi's or triple carbs.
While I've been finishing off the wiper panel:
Paul finished off the metalwork on the LH guard:
It then got a good wire-wheeling to remove the light surface rust and given a coat of Phosphoric Acid:
Buy yourself one of these:
https://www.ebay.com.au/itm/162693902809?hash=item25e14ff1d9:g:WbcAAOSwcINfCKRi
And ask your local media blaster if you can have a couple of buckets of his old worn out garnet.
I have one and I couldn't work without it.
I have had a few done by the Dashboard Doctor in Melbourne - all come back looking great, but if you have the accessory holes cut and want them filled, you have to tell them.
Cost is currently $850 and an 8 to 10 week wait.
I spend a bit of time in historic motor racing circles - what you've alluded to is a massive problem, as through the mists of time two people can own two cars that have the same chassis number...
As for #211, Tony asked this exact question of me and my reply was:
"We are not changing the identity of the car. We are saving it."
Fast Ignition = Poor quality, US owned, Chinese made junk.
Call Performance Ignition in Melbourne and order a brand new Scorcher Dizzy and coil.
https://performanceignition.com.au/p/scorcher
Connect two wires up, Time it and forget about it.
About $800.