Tonight's effort- 3 hours and only 6 figures painted- it was only a test but I will need to speed up! My first ever 28mm Napoleonics- not bad for a first crack but the final green highlight may be a bit too light. I'll see what they look like in the morning.
I'm still not sure of the basing. These are some 5cm wide trial bases. 6 figures looks good but it will be ALOT of painting. I don't really like the look of 4 figs on a 5 cm wide base (as per the two flanking stands).
I played round with a couple of options. The guys below are on 4.5 cm wide bases (by 5cm deep). I actually prefer this look. The .5 cm less width per base means that the figures are slightly closer together and looks "right" to me. If I go for this basing (and 16 figure battalions) it means less painting but I may need to make movement trays for vs Poochie etc. I don't see 9cm vs 10 cm (or 18 vs 20 cm frontages) as being a big issue and may be the compromise I make to get the get the look that I'm after.
In this shot the two stands on the left are on 4.5 cm wide bases, the two stands on the right are 5cm wide ones- not a great deal of difference but for me the ones of the left look better.