I've found at Hobby Town these really cool, new (at least to me), brushes called "Micro Brush". They come in 4 sizes, and instead of being a brush, they are microfiber balls at the end. The smallest in size is perfect for adding a touch of silver to a button on a dashboard, etc. They come in multi packs and are disposable. Their cheap too, under 2 bucks a pack. Their website is http://www.microbrush.com ...choose your country, and then the Hobby and Craft section. I find them invaluable when detailing my budget models.