Rich, number 9 and 10 casuals on order and have spotted two more awesome tartans. I wear these with a wide leather belt and sporran hangers for gardening, mowing and other yard work. I have yet to have mud or dust settle in and not wash out and be ready for "on the town" just by adding the sporran.
It's the same PV as your semi-traditional. I do avoid greasy and oily as it bonds to synthetics and never comes out. I actually wear an apron in the kitchen.