Tip of the Month - July

PREVENTING STAIN BLEED-THROUGH: Discoloration of the paint due to migration of stains from the surface painted, or from the substrate underneath.

Possible Factors:

• Painting over dirt, water stains, rust, etc., without proper surface preparation (cleaning/rinsing, application of stain-blocking primer)
• Use of the wrong type of primer, that is, one that is not sufficiently stain-resistant
• Moisture coming from behind the wall or trim, and transporting stains to the surface

Solution:

• Eliminate any sources of excess moisture behind the wall or trim
• Clean the surface and remove as much of the discoloration as possible
• Apply one or two coats of a stain-blocking primer (a 2nd coat enhances stain-blocking)
• On very severe stains, an oil-based or white pigmented shellac will work best

Next Month: MILDEW

Previous Tips:

Blistering
Cracking/Flaking
Burnishing
Lapping
Poor Sheen Uniformity
Yellowing
Preventing Stain Bleed-through
Mildew
Picture Framing
Poor Hiding
Poor Stain Resistance