Introduced in 1979, Hornby's 'Zero 1' system could be considered a precursor to today's DCC. The system, although...
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What is the Hornby Zero One system?Read more -
Which curve radius should I use on my layout?Read moreThis will very much depend on what space you have available. The best starting point would be to get a starter set....
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What factors will influence my choice of primer colour?Read moreSeveral factors can influence the choice of primer colour for a model:Desired topcoat colour: the colour of the...
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What should I set the pressure to on my airbrush?Read moreMost airbrushes will come with a pressure regulator built-in, but what is this facility for, and which pressure...
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How do I remove plastic parts from sprues?Read moreWhen building a plastic kit model it is normal for the parts to come out of the box arranged on a plastic frame. This...
What is zamak rot (zinc pest)?
Zamak Rot (also known as zinc pest or Mazak rot) is a problem that plagued some early diecast model parts due to impurities in the alloys used.
The impurities have the potential to corrode parts from within, resulting in alloys becoming fragile. The problem affected many chassis and wheels produced between the 1930s and 1970s. Early signs of rot include the appearance of a white powder-like substance followed by bubbling and the eventual cracking or crumbling of the alloy.
Some modellers have had success prolonging the life of affected components by soaking them in vinegar. This method appears to be most effective when rot is caught in the early stages.
Zink rot caused problems for most model manufacturers of the time but has now been mostly eradicated thanks to the use of improved raw materials and better manufacturing techniques, to the extent that genuine cases of zinc rot in the models of today are virtually unheard of.
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