Originally Posted by ECHO3ONE
.....my question is, could I reapply a heavier coat of knockdown and just paint over it. Or do I need to re-sand the area?
Thanks in advance.
You should re-sand.
One of the key points to doing proper patching is to "spread" the coating of the patch wide.
Example: When we patch a 3" diameter hole in a textured ceiling, the first coat covers and fills-over the repair, later - the second coat spreads out about 2X to 3X the area (12"x 12"+), the third coat is very wide and very thin (as wide as 2' x 2') . This hides the "lump" look of many amature patches.
The texture is later applied and spread out over an even larger area (4' x 4' or larger) and blended into the surrounding texture pattern, so that no edges are visible (the edges are the crucial areas that will show a patch - they must be undetectable with no ridges or thickness difference).