Georgian windows, particularly old ones have to be treated with a fair bit of respect whether or not you use WFP or trad methods.
Putty will only come away from the frames if it is loose, and whether it is the WFP brush or an applicator it will still fall away. But this only happens with windows in a poor state of repair, the same really with water getting through the windows.
Generally when this does happen it is only on the odd window and even then it is usually just a couple of runs on the inside of the glass. If the water gets through badly then the windows must be well knackered
Those windows with the stuck on UPVC strips are a pain
Once you have got rid of any old detergent and other muck that has seeped under the strips they come up absolutely fantastic, but if they have been cleaned with washing up liquid as the detergent in the past then it can take an awful long time to get them right.
Generally though, so long as the paintwork hasn't oxidised, WFP is top banana on georgian windows, no matter how old they are. If they are UPVC windows then WFP is way, way superior. The same goes for real leaded panes too, though of course there is a greater risk of leakage through to the inside with the really old ones.
I have finished work for Christmas now, but my last account today was a new account, £25.00, very old georgian windows, tall and narrow, on the side of a road that is so steep you need pitons and rope to walk up it
A 3 storey house with some windows that you could not do with a ladder as you would have to have the bottom of the ladder in the middle of the road, and the road is only just wide enough for 2 cars to pass.
This was the first clean for the house in years. Considering how difficult simple access was and the fact that they were as grubby as hell, I still only took an hour to clean it. Customer chuffed to bits, next month it will be 30 or 40 minutes
The point I am trying to highlight is that;
1/ done the trad way it would have taken 2 & 1/2 hours (if you were lucky
)and even then there would have been windows that couldn't have been reached.
2/ This was an old house and most of the windows were original (the glass too) and they came up really well.
3/ If I were still doing all my work the traditional way I wouldn't have touched this account with a bargepole
Many of my domestic accounts are large, old houses.
WFP?.......................
Oh yes
Ian