These Weathering Master Sets are an excellent way to add wear-and-tear detail to your models. The brush tip on the applicator is great for using all over your model, it will leave the powder on raised areas to replicate either a build-up of dirt or wearing away of paint. The sponge tip on the applicator works for adding streaks of whichever color of the set you choose. I think these powders work best with the brush tip, creating an effect of exposed metal where paint has been worn away from raised edges.