I had my walls painted(they were sanded first) some skimcoated.the skimcoated walls i have no problem with.the regular walls that were sanded and then painted now have like nailholes or round holes bulging through.I cant imagine it being nails as a few are on the ceiling but i could be wrong.I didnt notice them at first,they are unnoticable during the day and at night when the light is on the walls they are very noticiable.I feel like everyso often anotherone pops up,but i could be wrong as well on that.will they keep coming through?I remember when the walls were done the guy doing the job hammered all things like that and plastered over them.what could be the problem?