Sill brush and medium Mix brush I find are really good on soffits/ guttering/ cladding
Sill brush I'd quick due to the amount of bristle's and splay
Medium mix is great due to long soft bristles on the out side
Get in to all the nooks and crannys, and the black shorter bristles
are great for scrubbing
But if you use viro- sol there is no need to scrub
