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paint sheen changing from brush to roller

14K views 24 replies 14 participants last post by  cdaniels  
#1 ·
i painted this rather large mural this week.

we used Sherwin Williams ProMar 200 eggshell. it's rather hard to see from the photos, but the sheen drastically changed in the paint from brushing to rolling--and nothing, not even re-rolling it--put the sheen back to match.

i used the same gallon of paint and re-shook the paint before each use, stirring every 20-40 minutes before re-pouring.

it didn't matter what paint brush i used, brushing it made it one sheen. i had to do some touch ups for all colors involved, so everything has disparate sheen in blotches, but especially around the cut-in edges.

i finally just broke out the roller and re-rolled the really blotchy areas. again, the color was perfect, but the sheen was duller where i re-applied the paint.

i contacted sherwin williams and they were befuddled by the concept. they had no advice.

i read online about trying to burnish or scuff the surface to sort of buff it out to an even sheen--that didn't work.

finally, someone touched the wall and left grimy prints on it. this was after it had cured and dried at least a week. i got a wet rag to wipe the prints off, and the paint came off a little on the rag and every place that got went turned immediately a pale color. so basically getting any water on the wall--even droplets--means repainting that section.

is this crappy paint? is there a solution to the sheen? a top coat or method to level the sheen without repainting the whole mural?
 

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Discussion starter · #6 ·
let the record show i didn't pick out or buy the paint. the client and architect wanted to match a catalog so they had the paint ready for me on site. the black "caviar" is a dark grey-blue color, very weird--they said they use a clear base, so it was really thick and full-bodied but covered poorly. all that cutting in took a few coats. not fun; tons of hours.

so is that low quality paint? i don't use sherwin williams when i get to pick so i don't know.
 
Discussion starter · #8 ·
the client is satisfied and the project considered finished. i'm the one with the problem, i just don't like so much brushwork showing on a mural that is supposed to look silkscreened. i don't think anyone else would care, but i do. not just from a perfectionist standpoint, but i also want to understand my materials and learn about issues as i go along. i'd like to know why stuff like that happens and how to prevent it next time if possible.

usually i'm fairly cavalier about mixing semigloss and matte simply because i do painting-type murals most of the time. the paint is worked and everything sort of evens out when it's all said and done. this is a rather out-of character gig, doing everything so crisp without working the paint.

when i started, the wall was painted red and had been for around a week or more. i had to wait for the concrete stain guy to do this thing and it to sit for a weekend before i was allowed in, then it was wednesday before weather/materials allowed me to get in to start. the red is the same brand/sheen of paint.
 
Discussion starter · #10 ·
As I was reading your post, it reminded me of a problem I had last year in a kitchen. Went through the same ordeal. As I looked at your pic it occurred to me that your mural and my kitchen nightmare highlight wall have one more thing in common. RED! I'm not saying that is your answer but I never had this problem before and haven't since. Can you tell me if your problem is in the red part of your mural?
yeah it showed up more in the red (regardless of effort). it showed up in the black, but the black was thick and left heavy brushlines in some places, so there's actually disparate texture there in some places.

the red, tho, using the same roller to re-roll it didn't matter. it was just super finicky. the black was as well, just not as bad.