just going to have 3 bedrooms patched then skimmed as just rewired the house..having stripped the paper its opened a can of worms plaster falling off in patches + after taking old skirting boards off 2..rawlpugs i have also had to take out after ripping out the old dated mdf fitted wardrobes which has also led to chunks falling off around the rawlplug! silicone around the skirtings & archtrives..nightmare to be honest..struggling badly to get everything off the walls to prepare for the plasterer to skim etc what procedure should i take to get the walls ready for him ? sand the walls ? cheers