...such as this chirpy, classy seat/storage box:
"This was a gift from my hairdresser's flatmate, who was chucking it out. Somehow I managed to wrestle it home on the train and bus. I liked the fact it had a lid and thought I could make a cushion for it. It was probably from MFI.
I started by filling the big screw holes with wood filler and then I gave the whole thing a thorough sand inside and out (which resulted in horrible orange dust everywhere!).
Finally I had a piece of foam cut to the correct size to make a cushion pad [if you're in south London, Southern Foam in Clapham Junction is excellent] and whizzed up a removable cover on the sewing machine.
I remember feeling a bit trepidatious as I approached the stool cushion, as I'd only ever made flat cushions before – and not even very many of them. There are, as it turns out loads of different ways to do it. The way that felt easiest was to cut the fabric exactly as for a flat cushion and then cut out four extra strips of fabric; one for each side of the cushion. Then I sewed the strips between the top and bottom pieces. The advantage of this method is that you get nice sharp corners to the cushion pad.