How to Prep and Paint Loose and Peeling Paint
As tempting as it might be for some, in the interest of saving time and labor, to ignore surface preparation best practices, painting pros know that doing so can lead to big trouble down the road. From paint that won’t adhere, to premature paint failure, poor planning and groundwork can lead to only one thing: a bad paint job. So what are the important steps to ensuring your paint project is a success?
First, get rid of any loose or peeling paint. Depending on the project size and the surface conditions, you can use a number of tools to scrape and sand any loose or peeling paint, including a putty knife, wire brush, sand paper (80- to 100-grit) and a pressure washer. If you opt to use a pressure washer, be sure to use a wider fan tip to reduce any substrate damage.
When removing loose or peeling aged alkyd, feathering the edges of the old coating is recommended to achieve optimal blending. You can use a putty knife, wire brush or an orbital sander (80- to 100-grit paper) for the job. That said, when using a sander, do not apply too much pressure, as this might cause harm to the surface.
Also, if the aged alkyd has good adhesion, you can de-gloss the coating with TSP in a pre-mixed form or powdered form reduced with water. Just don’t forget to rinse the surface with clean water and wipe the surface dry with a tack rag!
Next, when priming and painting newly prepared substrates, consider the following coating recommendations:
- For wood, prime with ULTRA-GRIP® (Premium or Select) or EZ-PRIME® (ideal for redwood or cedar)
- On metal, prime with BLOCK-RUST® (on ferrous metals), ULTRA-SHIELD® Galvanized Metal Primer (on galvanized metals) or ULTRA-GRIP® Premium
- On masonry, prime with EFF-STOP® (Premium or Select), FLEX-PRIME® (Premium or Select) or ULTRA-GRIP® (Premium or Select)
Last, when it comes to time to paint the finishing coat, you may apply it with an airless sprayer, an HVLP (high volume low pressure) spray gun; or by brush and roll. Depending on the job and substrate requirements, any Dunn-Edwards paint an be used for a finishing coat, with two full coats recommended to achieve desired coverage and thickness.
While taking these extra steps may seem like hassle to the non-professional, painting contractors understand how vital they are to ensuring that the job gets done right. A successful, well-executed paint job means beautiful, long-lasting paint project and a satisfied client. Happy painting!