This may be obvious to most folks, but foam applicators are the neatest and most efficient way to apply vinyl dressing to your exterior moulding. I like the
EagleOne applicators the best for the wheel arches. They are the perfect shape. If you don't have those handy, these
foam wax applicators work great, too. I use
foam swabs or foam paint brushes to apply dressing to smaller trim areas.
Apply the
dressing of your choice to the applicator first, not to the trim directly. Then wipe on the trim.
Something that most people overlook, and it drives me nuts, is the wheel wells. Give the wheel well liners a quick spalsh of dressing to make them look black as well. A dressing such as
this will make them look very black. One of the easiest fastest products on the market is
this. I use it every week. Spray this inside, even dirty wheel wells, and it makes them look black and clean. It's like cheating and not washing.

It's fantastic!