iv always found it hard to decide just how “ruined” i want the inside of these ruined buildings to be, i normally go with Burnt Out. i dry brush the inside as i would the out side quickly paint the more obvious bits of wood and then do a very heavy dry brush of black. quick easy and looks pretty good too
@peter2 I personally just use house paint that’s been colour matched to citadel paints.
If you’re looking for a brand of of hobby paints that are Good quality and cost effective, you should try Army Painter or Vallejo.