puttying

If you can clear it all it can be replaced with a thin layer then pin quadrant beading over it while still soft. Clean off the excess putty and you are left with a clean finish ready for painting in couple of days. Might need a mitre block for the quadrant.

It is more expensive than using putty alone but gives a much better finish

Is this method ok for external surfaces? should've mentioned it's outside work I'm talking about. TIA

You can get a putty tape now. I got mine from a double glazing contractor. I think it came in a 10 Metre roll. Its two plastic tapes with 2mm of putty in between. You use it like double sided sellotape. Peel of one plastic and stick down to glass. Peel off other plastic and tack a wooden quadrant in place as previous response says. Clean off excess putty. Its cleaner and quicker. You might need a bit of practice so buy more than you need cos it sticks like $^$^(. and you ruin it if its not in the right place.

Dave

Sounds a good idea, I'll see if I can get some. Thanks

Yes. You bed the quadrant into the putty. The putty does the sealing. I'd suggest drilling some holes (0.8mm IIRC) in the quadrant to take the panel pins otherwise the wood will likely split. Putty over afterwards then paint or varnish when dry. Used this method on kitchen windows in my old house. Don't know how long it would have lasted but I replaced all the windows with PVC after 10 years anyway.

got mine from a double glazing contractor.

try Reddiseals.co.uk

Glazing mastic is better than putty, it can be applied by hand and it takes ages to set (you don't really want it to set but remain flexible) as a seal. It's specially made for glazing bead (you don't necessarily have to use quadrant), Glazing bead looks a lot better than quadrant.