To answer your question, no, it's not easily fixable.
A 2007 civic isn't the type of car you attempt to learn body work on.
If you were to attempt to refinish that mirror you would need to remove it first of all.
Sand it smooth, apply a primer if needed, and have paint mixed by a professional paint supply shop to match the car, not canadian tire.
Then you would need to spray a base coat and clear coat to the mirror.
The only supplies you can get from canadian tire for this is sand paper and masking tape, and maybe a respirator.
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