Did another two layers of micro today. One on the right, one on the left. I started to sand the bit I did last night but it wouldn't sand properly and would ball up. I guess it isn't quite set yet. Not surprising in this weather. I also noted that this morning's layer (well, lunchtime) was still soft to the touch. I'm guessing it will be 48 hrs after application before I can sand anything. No big deal as I am still just building up layers anyway at this stage. Slow going it is too. I'll get some photos when I have something actually worth taking a picture of; at the moment its just 'gloop'.