Where I can buy a new bezel to my MARQ Athlete?

The bezel is not available for purchase separately.

The bezel and display are a single unit.
Contact Garmin support.

or call a jeweler and it will look like this in the pictures below 

https://ibb.co/Wgt9FYK
https://ibb.co/M9fh1sj
https://ibb.co/MpCfCwn
https://ibb.co/55n5Tfr
https://ibb.co/Th4MJxV
https://ibb.co/FJwGLsX
https://ibb.co/dLnS8zS

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It's looking awesome!

How can Do you do that?

you have to find a jeweler who has the equipment and in 20 minutes it's done 

This will certainly void the warranty.

If the watch is under warranty, and now after this treatment - even if it was not opened - the watch has a defect, I do not think that Garmin will recognize the watch in this condition as a warranty case.

it's very easy to find out, call Garmin customer relations warranty and find out!

I buy my watch in oct / 2020 it haven't guaranteed anymore

I say there is no difference between yours with scratches and that with scratches down