Any guidelines/tips on painting the new range of Highlanders?

For the ones in the piccies I just used a range of fairly muted colours, reserving reds, blues and greens for the plaids.  No hatching, lines, cheques or patterns.   I then added a brown ink wash and left it at that.   I had people at Salute repeatedly asking me how I'd managed to get the tartan patterns on the plaids, to which I smiled knowingly....

Got to admit that your technique works admirably.

I would give it a 10+ and put it above my pay grade. Not too many people understand how to paint 6mm better then Peter! I’ve never attempted any patterns on kilts. Although l did somehow manage to paint an odd looking pattern on some socks and bands on shakos. Just don’t look too close!

However, many years ago l did see a pattern kilt painted on some of Baccus Napoleonic highlanders. 

It's "better THAN", Glenn! THAN! :)  I'll get you out of that habit if I have to chase you with  a Lochaber axe!

Seriously, though, Peter's painting of those Highlanders is excellent. I see what he means about people seeing tartan that isn't actually there. The brain fills in what doesn't really exist.

It must be my mixed heritage, part Scot, part English, full Canadian.

That must be it,  Glenn! Being Scottish, and once again living in Scotland after break of forty odd years, I'm seeing the non-existing tartan too!