How to make paint truly matte

[mitchino]

I am painting a green screen for a video shoot. I'm using Benjamin Moore Neon Green Paint in a flat finish.

Unfortunately it's not as flat as I'd hoped. Is there anything I can do to the surface or anything I can add to the paint (still got two coats to go) to get a dead flat matte finish with no sheen whatsoever?

Thanks for any help!

 

[Nige F]

Try adding talcum powder to the paint.

 

[Tigercubrider]

Rosco chromakey paint

I do this for a living

 

[mitchino]

Yep should have used Rosco and have done in the past, but no time to get any now before the shoot. This Benjamin Moore paint was recommended by a US colleague, and it is really good, a much purer green that I've found from the usual UK suppliers. Just not as flat as I'd hoped.

Does talc really work, and if so how much do you add per litre?

I was thinking a light sanding of the top coat should help?

 

[Bosswhite]

A coat of clear Matt Varnish ?

 

[mitchino]

I think that would be too shiny.

 

[Tigercubrider]

What about a scotchbrite pad?

Obviously a test area first

 

[SFK]

Michino

As tigercubrider said, or finest grade of WetAndDry sand paper such as 1200 (or 2400 if you can find it):
https://www.toolstation.com/shop/Pa...g+Paper/sd1730/Wet+&+Dry+230mm+x+280mm/p36366
http://www.screwfix.com/p/titan-wet-dry-sanding-paper-230-x-280mm-1200-grit-pack-of-10/98101

sfk