Very popular miniature from Romeo Models, the English Grenadier 18th Foot – 1751, 75mm scale.
It’s indeed a very nice model to paint, since it’s a lot of details, like the hat.
The painting technique is what is now my standard process, that is the mixed acrylic-oil. Of course, to remove the satin/glossy effect that often oil colors are about, at the end I spray a super matt varnish (by AK) with the airbrush.