As a Professional Portland House Painter I often get asked,
Portland House Painters
“When is it necessary to completely remove failing paint, verses just spot prepping?”
Before I answer that question lets discuss what, poor inter-coat adhesion is.
Over the years surfaces will receive many layers of paint. Because
people often don’t take the time to properly clean and prepare before
they apply each coat, one of those lower layers of paint might not be
able to support the weight and pull that is created by another coat of
paint causing the entire coating to peel with very little effort.
I recommend before you paint any surface that you do an adhesion test.
There are two reasons to perform an adhesion test. One is to identify poor intercoat adhesion another is to confirm that the coating system your about to apply is going to stick before you complete the whole job.
The adhesion test method I prefer is to make
small cuts in the coating with a razor knife being careful to not cut
down into the wood. Then place 3M 2020 white tape over the cuts, rub a
few times to make sure the tape is firmly adhered, and then remove. If
the tape removes more than 10 – 15% of the coating I would advise you
too completely to strip the coating and start over.
In this
example I tested a well-known primer from Portland house painter
department of Home Depot and a Quality water based enamel. This is the
paint system that was recommended when painting over lacquer which is
most commonly found on cabinetry.
Now as you can see more than 15% of the coating came off so I would definitely avoid this primer in this situation.
In my next video I will show you step by step how we strip paint,
what products and tools we use, what primer we recommend and finish
coats. The next video is titled “Stripping paint from a front door”
Brian Kemnitz has been a Portland House Painter for over ten years
in the Portland Metro Area. He is the owner of a Portland Painting
Company call Pearl Painters. If you are in the Portland Oregon Metro
Area and would like to take classes please contact Brian at his Studio.