Interference in Tips & Advice: Painting Posted September 7, 2002 What brand/type interference did you get? I'm seeing all kinds, and really want to make certain it will mix okay with the Reaper Pro Paints. Acrylic, Watercolor, or Oil (probably not an oil based) Pre mixed or powder? I'm also trying to find it here in Austin. I looked at Hobby Lobby and couldn't find it. I'll try Michael's today.