Hi On freshly plastered walls I used No Nonsense Lightweight filler to cover a good number of trowel marks. I then mist coated with Leyland watered down contract matt. Finish was all good. I've now come to top coat with Wickes Home Vinyl Matt white emulsion and all the filler marks show up and appear indented from the rest of the walls. In certain lights the walls look horrendous. I've tried patching over with Zinsser BIN and Bullseye 123 in different areas and where the transition between each Zinsser primer and mist coat is, when the emulsion top coat is applied it again indents and looks awful. This makes the prob worse. I've tried sanding/feathering down but when top coat applied the indents reappear. I've tried No Nonsense ready mixed filler over the indents, sanded back smooth, but indents reappear after top coating. I've scraped back a couple of areas of filler and repainted and all is fine, so the issue appears to be the lightweight filler or perhaps the Wickes Vinyl Matt Emulsion combined with the filler or Zinsser? My question is instead of having to scrape off all the filler, is there any other product out there that I can apply over the indent to smooth out and give me a relatively smooth finish? I've read Toupret is good, but would it behave just like the no nonsense ready mixed filler? I've painted many walls but never come across this issue before - but never used the lightweight filler. Any help would be much appreciated. Many Thanks P.S. I'm not sure if this is called paint flashing, it's difficult to identify researching on the Web.