The basics Grime FX Ash is a powder that simulates burnt wood or coal debris. The benefits These realistic details can play a huge role in conveying a character’s authenticity. The uses Distress the face, body, wardrobe, and prosthetics with this light-weight, pigment based powder. The bottom line Ash Powder is a product that will find great use in the kits of SFX, Theatrical, Cosplay, and Film & Television artists.