Er, 'non-stick bushings', that is something that is in the same category as unicorns, leprechaun's, the tooth fairy, honest politicians, bigfoot, alien abductions and the lock ness monster. Something we hear often about but there is no proof to the claims. Restricting your scope to a specific type of material limits your creativity and encourages economic materialism.
For example as previously mentioned adding wax to the metal is a very easy fix, it's very cheap and economical.