Hi @NorthBoy
So the spray I found applying liberally and leaving it for a few mins to penetrate worked quite well. My dash really was only sticky down near the screen, I would say one pass over most of the dash was enough, the actual sticky bit I did several times and still have quite a bit left.
The finishing coat I did everywhere, I got some of the foam brushes the company use in the demo videos off Amazon for very little money and then also had a very small watercolour brush to do the detail areas. I have only done one pass so far and it was quite cold when I did it, now a few months later it definitely needs doing again as there is some areas that can be seen not quite be an even tone. Again though I have loads left to do it again so when the weather warms up do it again and possibly a third time to get it perfect.
Regards sugru, you can use it for deep scratches, I had a few dents that I completely covered and used vinyl I had to apply the leather like pattern. As an aside the dash paint in the kit covers the sugru completely but it takes an extra coat so I would suggest giving the sugru areas an initial pass with the paint, let it dry then do the whole dash.
I was a bit like you dude, I didn't want to start it and make my dash worse, but that 100% is not the case it was very simple and the results are great.