Replacing the front element

[TME]

by doing that you are also removing whatever coating on it as well.

Hmm... that's true but can the coating be easily reapplied?

 

[oeyvind]

Hmm... that's true but can the coating be easily reapplied?

Don't think Canon, Nikon nor any lens manufacturers has ever release their secret coating technology to the public or any third party.

In other words, change the front elements, ignore it (if it does not affect image)...