Water-resistant: Before using oil-based paint, the substrate must be prepared with primer if this has not already been done. This is to prevent the oil color from disappearing or destroying the surface.

Preparation Steps:

• Check if primer has been applied: Ensure the substrate is ready for oil-based paint.
• Apply primer: If not already done, apply a suitable primer to protect the surface.
• Prevent damage: Proper preparation helps in avoiding the oil color from disappearing or damaging the substrate.