04-22-2008, 10:26 AM
Hi frossie ! Steve da painter here again.
Ok... so what's going on is Burnishing. Burnishing happens when you use a flat finish paint on a base color of 3 or 4. Think of base 1 as white...base 4 as real dark, black. Just from your reply I can tell you that your exterior paint is a flat, grey or blue, maybe a darker brown...my guess is blue? Whatever it is, I'm sure it's on the darker side.
SO... why this happens.......Paint basically has three componants. Pigment (color) excellerators (helps it dry) and binders (makes it hold on). When going with a darker color the paint has more pigment in it, a lot more. Having this much pigment in a can of paint takes a little away from the other two to aquire the deeper color. If you use a flat, there's not a sheen on all that pigment to protect it. The color, ie (pigment) sits on top. Useing a sheen, even a satin creates a protective barrier between the color and the elements and you don't get burnishing. Think of a chalk board...you could draw all over it then wipe it right off, but if you were to spray a clear coat over the chalk, it would "lock" it in and protect it, same thing with a deep base color flat on a house. Trying to "clean it" will make it a lot worse. A burnishing house can be left alone yet the paint job is not going to last very long as there is nothing to protect all that pigment from the elements. As much as it pains, what I would do is put one more coat of paint on with a sheen, problem solved. I know that sounds easier said then done, but choices are limited. #1 Leave it alone and know that you will be re-painting in three years, #2 One more coat in a sheen that will make the paint job last for many years to come.
The other two parts did their job. The binders can do only so much with all that pigment.
Ammonia is an alkaline compound of nitrogen and hydogen that is soluble in water making a fast cheap excelerator for latex paint. Yet, it dries out faster then the other compounds of paint and is cheaper then other excelerators used in more quality paint. My point is, if the paint has a strong ammonia smell...it's cheap paint and brings the threat of burnishing up even higher. I'm sure you had good paint, wrong sheen. A little off track for the paint knowledge of the day!
Hope this brings a better understanding of what's happening and why.... Didn't hear the answer of the trim paint...coming off to bare wood??
www.newcircleartworks.com
residential & commercial painting
Ok... so what's going on is Burnishing. Burnishing happens when you use a flat finish paint on a base color of 3 or 4. Think of base 1 as white...base 4 as real dark, black. Just from your reply I can tell you that your exterior paint is a flat, grey or blue, maybe a darker brown...my guess is blue? Whatever it is, I'm sure it's on the darker side.
SO... why this happens.......Paint basically has three componants. Pigment (color) excellerators (helps it dry) and binders (makes it hold on). When going with a darker color the paint has more pigment in it, a lot more. Having this much pigment in a can of paint takes a little away from the other two to aquire the deeper color. If you use a flat, there's not a sheen on all that pigment to protect it. The color, ie (pigment) sits on top. Useing a sheen, even a satin creates a protective barrier between the color and the elements and you don't get burnishing. Think of a chalk board...you could draw all over it then wipe it right off, but if you were to spray a clear coat over the chalk, it would "lock" it in and protect it, same thing with a deep base color flat on a house. Trying to "clean it" will make it a lot worse. A burnishing house can be left alone yet the paint job is not going to last very long as there is nothing to protect all that pigment from the elements. As much as it pains, what I would do is put one more coat of paint on with a sheen, problem solved. I know that sounds easier said then done, but choices are limited. #1 Leave it alone and know that you will be re-painting in three years, #2 One more coat in a sheen that will make the paint job last for many years to come.
The other two parts did their job. The binders can do only so much with all that pigment.
Ammonia is an alkaline compound of nitrogen and hydogen that is soluble in water making a fast cheap excelerator for latex paint. Yet, it dries out faster then the other compounds of paint and is cheaper then other excelerators used in more quality paint. My point is, if the paint has a strong ammonia smell...it's cheap paint and brings the threat of burnishing up even higher. I'm sure you had good paint, wrong sheen. A little off track for the paint knowledge of the day!
Hope this brings a better understanding of what's happening and why.... Didn't hear the answer of the trim paint...coming off to bare wood??
quote:
Originally posted by frossie
Wow thorough answers...
To answer some questions that were raised - we did use good quality paint when we painted, but since it just went over the previous product I don't know whether that would have necessarily helped. When I said it comes off the hardiplank, I mean if you rub your hand it looks like you rubbed a chalky board.
I am sure going to get in touch with Steve!
www.newcircleartworks.com
residential & commercial painting
www.newcircleartworks.com
residential & commercial painting
residential & commercial painting