I have a few paint chips to touch up and I saw good comments about Langka to level the paint after touch up. Mt first attempts have not been very successful, the Langka did take off the excess paint, but the chipped area is still below the surface of the surrounding paint, so it is still visible. Maybe I didn't let it dry long enough ? I left it about 6 hours ? I am using paint from Paintscratch.com. What do you reckon ?