After having the experience of building with copper and watching it rust, I think it would be cool if you could prevent oxidization somehow. 1.17 already has that feature with it's own copper so maybe a system similar to that?

Resolved in Create 0.4+.

For reference the 1.17 system is:

• Right click with honeycomb to wax, preventing oxidation.
• Right click with axe to remove wax.
• Right click un-waxed block to take it back an oxidation stage.
• All of these can be automated using a dispenser.
• Lightning rods when struck by lightning will lower oxidation levels of connected copper blocks (radius of about 7 blocks, cannot find exact number rn). The amount of stages depends on proximity to rod and a random factor. (its random, no idea how to phrase that properly)