JEES mate you must have struggled like F***.
Going over historical jobs un finished is always such gamble. We never give garuntees, give the options/costs . but as always money talks.
One to put in the experience book though.
Priced a render job up the other day where the builders bricky had done the scratch coat ,, What a bloody mess. he wasnt to happy when I said it all had to come off as could not garauntee its integrity.