Create casing/trim for vent covers. This adds aesthetic appeal, but also has a number of practical applications.

If a vent cover screw does not line up with framing lumber the casing acts as a secure hold.

If there are drywall/sheetrock issues, the trim can cover them from view.

Step 1: Cover Issues

Drywall/sheetrock damage and no framing lumber to secure the vent cover.

Step 2: Casing

Use door/window casing to create a frame. Or create your own custom casing.