Hello,
I'm painting a square room, and one wall is to be red; the other walls should be white. All the walls are spackled. I am having trouble getting a perfectly straight vertical line in the very corner of the room, where the red paint of one wall ends, and the white paint of another wall begins. The slight protrusion of the spackle makes this transition look very jagged, as it also causes paint to bleed underneath the masking tape when I try to mask off a nice line.
Is there a trick to getting a nice straight vertical line that transitions from one color to the other in this situation? Someone suggested to me 'gum arabic', but I haven't the slightest idea what it is, or what I might do with it.
Thanks!
-Jeff