To paint over waxed paint effectively, the first step is to determine the hardness of the wax layer. The method for preparation depends entirely on whether the wax is soft or hard.
Start by checking the wax hardness: Try to scrape off a little with your fingernail.
Scenario 1: The Wax is Soft
If you can successfully scrape off the wax with your fingernail, the wax is considered too soft for paint to properly adhere to.
- Action: The soft wax should be removed before attempting to paint.
- How to Remove: Use mineral spirits to clean off the soft wax.
Once the soft wax is removed, you would then proceed with preparing the underlying surface for painting (though the reference doesn't detail these steps).
Scenario 2: The Wax is Hard Enough to Paint Over
If you cannot scrape off the wax with your fingernail, the wax is hard enough to potentially paint over.
- Action: You can proceed with painting after preparing the hard wax surface.
- How to Prepare: Etch and scuff it before painting. This creates a rough surface that allows the paint to grip better.
| Wax Hardness | How to Check | Action Required Before Painting |
|---|---|---|
| Soft (Scrapes with fingernail) | Scrape a little with fingernail | Remove the wax using mineral spirits |
| Hard (Does not scrape) | Cannot scrape with fingernail | Etch and scuff the surface before painting |
Proper surface preparation, based on the wax's hardness, is crucial for successful paint adhesion and a durable finish when painting over waxed surfaces.
