Years ago we bought a couple of metal folding chairs. They have come in super handy in many different ways, depending on the needs of our apartment a the time.
In this apartment, I often set up a "sunny photoshoot mini studio" by the windows using a TV tray and a folding chair. The chair I use has been well loved, so the seat had a little tear that just kept growing. I dug out some of my favorite heavy duty fabric from the hoard and got ready to revamp these workhorses.
First, I unscrewed the seat. It's just a piece of particle board with a little foam and vinyl stapled over it.
Then I folded my fabric over the edges of the seat. I put the white selvage edge at the back of the seat so I could put it back on the right way without a lot of buffoonery.
I was prepared to sew the fabric to the vinyl, but when I did a quick test by pinning the fabric to the chairs, I realized that was all that was needed to secure the covers. OMG so easy!
See? I pinned through the fabric and the vinyl of the seat cover on the back side of the seat.
At the corners I tried to keep things neat. I used as many pins as it took to keep things looking good on the top side.
Progressive elaboration ... a.k.a. I figured out how to do better corners as I went. ;)
When I screwed the seat back on, I made sure the screws were super tight so they hold the fabric and pins in place. I love the way the chairs look now, plus it's much more comfortable to sit on fabric than vinyl. It will also be supercake to change them in the future.