Professional Painting Contractor

Fall 2013

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ask your propartner Re-priming guidelines, maximum temperatures for painting, measuring mils Are there any drawbacks to re-priming a surface already primed with latex with an oil primer? Rick Watson, Product Information The SherwinWilliams Company How can I be sure that I am applying the right mil thickness of paint? Is there a way to measure this? Not usually. Primers can be universal, but it is always best to stay within the same system. If you start with oil, stay with oil, and vice versa. Primers are not designed to withstand weathering. In addition, the longer the primer goes uncoated, the more chance that it will get dirty from rain, atmosphere, etc., and in some cases the primer may begin to break down. It may be better to prime and paint one area at a time to insure that you can topcoat the primer within the allotted time. You would use a wet film thickness gauge available at your local Sherwin-Williams store. Is there a maximum surface temperature that a paint product can be applied? I've noticed that there is a minimum temperature given for applying the product on your Product Data Page information sheets. Application surface temperatures will vary depending upon the product. Often, a general rule of thumb is to apply paint when the substrate temperature is no more than 100° F (about 38° C). 30 PPC Fall 2013 I have a friend who has been building a seaworthy boat for a number of years and has asked me to paint it both inside and out. Durability is paramount and it was suggested to scuff sand the interior then prime with a general purpose primer followed with a standard epoxy paint. My suggestion would be to use a paint designed specifically for boats. Standard paints and epoxies will not hold up to immersion and UV degradation. PPC

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