Paint is applied to the surface to serve two basic purposes: Decoration and Protection. Each paint has its own life. Deterioration of the paint earlier to its rated life is considered as a failure of the paint.
The defects in paint are due to several reasons and causes. To achieve good painting work, painters and site supervisors should understand thoroughly the causes of defects and preventive measures to check the common defects that occur at different stages of the life of paint. They are also supposed to be familiar with the remedial measures to fix or improve any accidental defects.
Several defects like chalking, blistering, bittiness, peeling, cracking, etc. are observed in painting, either during painting or sometimes after the painting. These defects arise due to either chemical attacks, effects of atmosphere, sunlight, heat, humidity and dust or individually or jointly deteriorating it. Among them, bleeding is the most common defect that is observed on painted surfaces.
Bleeding is normally observed as “spots or patches of discoloration in the top coat”(often in red or yellow colours). We have already discussed causes of bleeding in paint. Bleeding in paint gives an unpleasant look to your house. Therefore you need to find the solution for this type of defects.
Courtesy - Shutterstock
Following Precautions should be Taken to Prevent the Bleeding of Paint:
- Thoroughly clean the areas to be painted before and after sanding, especially when you are applying lighter colours over darker colours.
- Avoid using lighter colours over older shades directly. First, apply a sealer. Select the right thinner and use correct paint application.
- Use the correct mixing ratios (showed in the data sheet) and mix the components in correct way into a homogeneous mass.
- Apply two medium coats of primer, in accordance with manufacturer’s recommendation. Then re-apply colour coat.
Tips for Fixing or Repairing Bleeding:
- If possible, remove the old paint first. If this is impractical, seal the surface with patent knotting or wood primer.
- Removing the stained or contaminated layer and applying a suitable sealer coat to prevent the diffusion of soluble-coloured material of the substrate can repair the bleeding area of the paint. Apply a sealer coat to remove the stained or contaminated layer.
- If the defect appears, after you have done all the work then if you used filler, refill it. If it is a reaction with old coat then sand the top coat to the bottom one, apply the sealer and top coat again.
- After the film gets fully hardened, sand thoroughly till the surface of the putty. Apply a sealer and re-apply the final coat.
You have therefore to apply paint very carefully after reading the manufacturer’s instructions properly. Understanding fully the causes of bleeding will prepare you enough for starting the painting process and will make the job easier for you.