Any contact will probably cause some minimal damage.
the bumpers
they are not bumpers they are merely covers for the bumper system behind them
Renault 5 (1971) in plastic (polyester and glass fibre)
auto body repair shop plastic in tube made for fixing cut or ripped plastic bumpers worked on ours for 3 years so far
So that if it hits anything it does not effect your bike and plastic is the most lightest and strongest material.
Armor all can be used on plastic bumpers, since it's chemical composition is very effective, in minimizing the chances, for dust and dirt to temporarily, attach to a car's surface. It's important to spray a clean cloth and then apply it uniformly, to the surface of the bumpers, which will create a protective coating layer.
Today they are made of a type of plastic. They use to be chrome or steel.
Use WD-40, very easy, great results.
They are used for making plastic's but the plastics they make aren't biograble
in old cars bumpers was made of steels and other heavy metal materials nowadays polymer composites are use in this field because of their Strength and Lightness TPOs( thermoplastic olefins) are good example for this case at the other hand, the importance of polymers is their "memory effect" we can call this effect "the polymers Secret of success" polymers have memory like a Spring after an accident, when the impact makes bumpers deformed, the plastic bumpers can return to their previous shape memory effect and lightness is just two of the benefits that will convinced us to Farewell with metal bumpers
Plastic is dangerous because the paint on it has somewhat of a kind of chemical which makes people, animals, plants die.
Like plastic somewhat.