Suggestions for adding these borders?

[aanden]

4" Tile (4.25in x 4.25in) Frame - Flat or Wall Mount

One of my first real projects, a frame for engraved 4.25 tile. I did it in Proofgrade Medium Walnut Plywood (I think that’s the one). The triangles were cut as spacers for the corners to flush the tile with the frame and also double as an invisible method to ensure the finger joints stay together when glued in. They also provide space for the screw/nail head for the keyhole I added (thanks @jbmanning5) and assembly just took a few minutes of gentle tapping and bit of wood glue. There are 4 ext…

Not my design, but this would work. Shellac would help with weatherproofing.