How Much Is It To Get Plates On A Car In Ontario Why Are Some Ontario Licence Plates So Rusty And Dusty?

Why are some Ontario licence plates so rusty and dusty? - how much is it to get plates on a car in ontario

I noticed that (most vehicles) in Ontario license plates with the following breakdown of

# # #?

(where # is a serial number and Denita? is an alphabet)

are almost always very rusty. Why is this so?