Valet Pro Detailing Brush Small
This is one of the most popular brushes for valeting use on the market. Soft bristles mean that it's great for cleaning wheels and engines. It can also be used to clean door shuts and around badges (when used on paint surfaces such as door shuts and badges, keep bristle clean to avoid marring). Whilst doing all this the Sash Brush still maintains a low price, meaning that this is a very popular product.
If you need a brush slightly larger then consider: Valet Pro Detailing Brush Large