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 A Guide to Problem Solving - The Application of Interior Wood Coatings
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Pinholing
Minute holes in a dry film which form during application and drying of the coating.
Cause
Preventative Action
The first coat on open grain wood has been applied too dry and at a high viscosity.

Reduce the coating to a viscosity that will flow into the open grain of the wood and displace the air.

The thinner in the coating is too fast for the environment.
Choose a suitable thinner from the product data sheet, a slower thinner will generally allow the coating to flow out to an even, defect free film.
Coating system applied in a high draft environment.
Use a retarder thinner and apply the coating in lighter coats.

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Disclaimer: The recommendations above are based on data from Mirotone’s own research and information from others whose work we believe to be reliable. Due to possible differences in actual application methods and conditions, users must satisfy themselves that the end result meets their requirements.
     
 
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