Finally fitted my 26 quid of Chinese bling to the pedals and footrest.
The existing brake pedal came off easy, I just got a bowl of boiling water and put the pedal in it to soften the rubber and add a bit of lubrication, and then just pulled the top off. The soaking took 20 seconds or so and removing the rubber likewise. The hot water made it easy to remove the rubber 'location peg' in the pedal, so I could reinstate if I wanted to. Although I was equipped with lots of tools, didn't need any of them in the end. To fit the new one I just used the same hot water to make the rubber more flexible for the new pedal, lubricated with a small amount of washing up liquid and it went on no problem. Washing up liquid is good for this kind of application when you want lubrication to fit rubber but then have it secure once dry. All in all much easier than expected.
For the accelerator pedal, touch of washing up liquid, slid on no problem over the existing one.
For the footrest, I reshaped it a bit to fit, not sure it is the 'right way up' but I like it! Hacked off one side (left on the photo) with the old Japanese pull saw, which removed an inch or so and made for a better fit, then tapered it in on both sides at the bottom from the metal insert. (By the way a decent Japanese pull saw is a worthy investment if you don't have one, they are somewhat pricey but you get ultra precise cutting and clean edges on plastic, carbon fibre and wood, and even though they are a hand tool, plenty fast enough on most materials.) Finally cleaned the underlying footrest carpet bit in the car to improve adhesion, then ran the sticky pad on the back of the footrest under boiling water to get it ready for action (before peeling the plastic off) and then applied it. Seems to be stuck solid at the moment. I may put something behind it to improve foot position but thought I would give it a go as it is right now for a bit.
Of course I then had to go and test the car to make sure it worked - as you do
More cheap as chips Chinese improvements coming soon!