I found a plain, outdated mirror at a thrift store for three dollars. The frame was scratched and the finish was dull. Instead of passing it by, I decided to try a cheap mirror makeover using basic wood trim and spray paint. This simple DIY transformed that boring mirror into a custom piece that now hangs in my hallway. If you are new to DIY projects, this budget home decor hack is a great place to start. You do not need fancy tools or experience. Here is exactly how I turned a thrift store find into a stylish accent for under ten dollars.
Why a thrift store mirror is the perfect DIY canvas
Thrift store mirrors often have good glass but ugly frames. That is exactly what makes them ideal for a beginner-friendly update. You can skip the frame entirely by removing it, or you can build a new frame over the old one. I chose to remove the old frame because it was damaged, but you can also leave it on and cover it with trim.
The best part is the cost. A secondhand mirror typically costs between two and eight dollars. Compare that to a brand new framed mirror, which can run thirty dollars or more. For a fraction of the price, you get solid glass and a blank slate. Plus, thrift flipping old mirrors keeps them out of landfills, which feels good.
What you need to buy for this DIY mirror frame hack
Before you start, gather your supplies. Most of these items are cheap and available at any hardware store or dollar store. Here is my exact shopping list for a 24 by 36 inch mirror.
- Wood trim – I used two 8-foot pieces of flat “lattice” trim (about 1.5 inches wide, $2 each).
- Spray paint – One can of matte black or any color you like (around $4 at the discount store).
- Liquid nails or strong construction adhesive – A small tube costs about $3 and will last many projects.
- Sandpaper – A single sheet of 120-grit (dollar store).
- Painter’s tape – To protect the mirror glass.
- A miter box and saw – If you do not own one, ask a friend or buy a cheap plastic miter box for $6.
Total cost for me was about $9, not counting the mirror itself. You may already have tape or sandpaper at home, which brings the cost even lower.
How to measure and cut wood trim like a beginner
Cutting wood corners at a 45-degree angle sounds intimidating, but a miter box makes it easy. A miter box has slots that guide your saw at the correct angle. First, measure the length of each side of your mirror. Write them down. For my rectangular mirror, the outer dimensions were 24 by 36 inches.
Now decide if you want the frame to sit flush around the mirror or extend slightly beyond the edge. I wanted a snug fit, so I cut the trim pieces to match the mirror’s length and width exactly. The trick is to cut each end at a 45-degree angle pointing inward. That means the short side of the angle equals the mirror side length. I practiced on a scrap piece first, which saved me from ruining a good length of trim.
After cutting all four pieces, lay them on the floor around the mirror to check the fit. If any corner has a gap, you can sand the edges gently with that 120-grit paper. Do not expect perfection on your first try. Small gaps are fine because paint can hide a lot.
Painting your mirror frame for a smooth finish
Spray paint dries fast and creates a smooth, even coat if you follow a few simple rules. First, paint the wood pieces before you attach them to the mirror. That way you do not have to mask the glass. Find a well-ventilated area like a garage or a patio. Lay the trim on a drop cloth or cardboard.
Shake the can for one full minute. Then spray in light, sweeping passes, holding the can about eight inches away. Do not try to cover everything in one coat. Two or three thin coats look much better than one thick coat that drips. Let each coat dry for 20 minutes according to the can’s instructions. I used matte black because it looks modern and hides dust. You could choose white, gold, or even a bright color to match
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