To effectively cover oil paint, especially if you are switching to a latex or water-based paint, it is important to take specific preparation steps. Simply painting over oil paint with latex or water-based paint will not work effectively.
Preparation Steps for Covering Oil Paint
Here's a breakdown of the essential steps you need to take, based on the reference provided:
- Sanding:
- The first step is to sand off the glossy finish of the oil-based paint. This will create a rougher surface to which the new paint can adhere.
- Cleaning:
- Next, wash the surface with TSP (trisodium phosphate). This removes any remaining dust and debris, as well as any oils or contaminants that could affect adhesion.
- Priming:
- Finally, prime the surface before painting. A primer creates a base layer that helps the new paint bond effectively. Using a high-quality primer is crucial for achieving a smooth and lasting finish.
Why These Steps Are Necessary
Oil-based paint is naturally very smooth and non-porous. Latex and water-based paints do not adhere well to this slick surface. By sanding, washing, and priming, you are creating a suitable surface for the new paint.
| Step | Purpose |
|---|---|
| Sanding | Removes the gloss, creating a surface that paint can grip |
| Washing | Cleans off dirt, dust, and oils, promoting proper paint adhesion |
| Priming | Creates a base layer that the new paint can effectively bond to |
Key Takeaway
Following the outlined steps will ensure that your new coat of paint will stick to the old oil-based layer and last for a long time. You cannot directly paint over an oil-based paint with a latex or water-based paint.
