How does the porosity of cast iron affect paint adhesion on outdoor chairs?
The porosity of cast iron plays a significant role in paint adhesion, especially for outdoor chairs exposed to weathering. Cast iron's porous surface can trap moisture, oils, and contaminants, which may interfere with paint bonding. If not properly prepared, the paint may peel or blister over time due to poor adhesion. To ensure durability, thorough cleaning, degreasing, and priming are essential before painting. Using a high-quality primer designed for porous metals can fill microscopic gaps and create a smooth base for the topcoat. Proper surface preparation and paint selection will enhance adhesion and extend the lifespan of painted cast iron outdoor furniture.
