2. Is Aussie Clear or Aussie Clear Light suitable for any hardwood species?

Yes, Aussie Clear and Aussie Clear Light are suitable for all hardwood species and also for Cedar (which is a softwood).

Note that Aussie Clear and Aussie Clear Light have different coloured pigments, so on mid to dark toned hardwoods, either version of Aussie Clear will appear transparent. However, on blond or light coloured hardwoods, the pigment colour will be noticeable. Aussie Clear Light is the colour that most people will prefer on blond coloured timber as the finish will resemble “wet straw” in most instances.