Originally posted by ToddMcF2002
I'm a bit behind you. Two coats and I need to wetsand.
Throughly soak that sponge, (it takes 2 - 5 minutes "floating") then squeeze as much water out of it as you can with several good squeezes. The sponge should be damp, and not leave what looks like a watery trail behind.
Wet sand with broad sweeping strokes that are applied with a "lay on the surface" pressure. Check the Sponge after 20- 30 strokes and see how evenly your receiving paint across the surface of the sponge, and adjust the pressure accordingly. You don't want to "Bulldoze" the surface with a heavy edge. If you can see scratches left behind you, you pressing too hard.
When the sanding surface of the sponge is evenly loaded with paint to the point you cannot see the "Gray" of the silicate, rinse (*scrub*) the surface clean, wring, and resume.
Smoothing is all you want, not gross removal of material. If you have a serious bump or ridge, apply specific attention to that one area until "ALMOST" even, then sweep across it and apply marginally harder pressure as you pass over it.
It's all common sense.
Oh yeah......, you should NEVER apply sanding to the final coat of a Flat finish. It may be flat, but that small degree of sheen that "smooth" adds helps give the image an added punch, but without any added glare. It's not a lot of difference, but at this stage, it's all cumlative. A lot of little, "It's done right." adds up to exemplary end results.