# Finish Defect Diagnosis

## Symptoms & Causes

### 1. Blush (Milky/Cloudy Haze)
- **Cause:** Humidity trapped in the film. Cooling solvent condenses moisture from air.
- **Fix:** Mist with "Blush Eraser" (Retarder solvent) to re-flow and release moisture.

### 2. Fish Eye (Craters)
- **Cause:** Silicone contamination. (Did you use Pledge or WD-40 nearby?).
- **Fix:** Seal with Shellac. Add "Fish Eye Eliminator" (silicone additive) to lacquer (Last resort).

### 3. Orange Peel (Bumpy texture)
- **Cause:** Fluid pressure too low, viscosity too high, or gun too far from surface.
- **Fix:** Level sand and spray wetter/thinner coats.

### 4. Runs / Sags
- **Cause:** Too much material, vertical surface, gravity.
- **Fix:** Let cure hard (24h), scrape flat with razor blade, sand, re-shoot.

### 5. Witness Lines (Map contours)
- **Cause:** Sanding through layers of color/clear.
- **Fix:** Spot repair color, clear over everything again.

### 6. Crazing (Cracked glass look)
- **Cause:** Thermal shock (Cold guitar -> Warm room) or incompatible layers.
- **Fix:** Amalgamator (for Nitro) or Strip and Refinish (Poly).
