Zinc Pest/Mazak Rot - known affected models

[Yorkshire Dave]

Following on from @Richard Insole 's thread Learning On The Job there is a useful list on t'other side (RM Web) of known models to be affected with Zinc Pest - Mazak Rot.

Zinc Pest - Mazak Rot known affected models.

 

[isleofthanet]

Reading the headline takes me back to the fifties and sixties when almost all cars had trim and door handles etc, my Jowett's were one example made from mazak or zamak. Problems with pitting and finding a cure apart from rechroming which rarely worked long-term was a constant headache.
Reading in a classic car mag recently there are a few firms now that specialise in repair which looks to be time consuming and expensive but what is the alternative?
Alan

 

[Allen M]

Reading in a classic car mag recently there are a few firms now that specialise in repair which looks to be time consuming and expensive but what is the alternative?

This might be rubbish but it crossed my mind.
Take the old object and build it up to shape with some sort of filler. Paint (if necessary) and copy with a 3D scanner, the print a copy. Use that to make a mold to cast a new item.
As I said!!!!!!!!!!!!

Regards
Allen

 

[simond]

Allen

your idea is far from daft.

It’s entirely possible to scan to data, “fill and polish” the digital model, 3D print in a plastic suitable for investment casting, and burn out the plastic when firing the mould. Cast brass or other alloys in the investment, and then polish and chrome, though for something the size of a car door handle, it’s likely an expensive proposition, particularly if the component is functional and needs to be made of metal.

then again, if there’s a rare vehicle that depends upon a few unobtainable parts for completion, there will be folks who have the money.

and in this month’s classic bikes, there’s a 1973 MV Augusta (750/4) which made £126500 at Bonhams’ Stafford sale two weeks back…