Am repairing window frames and sills where they have gone rotten with the above excellent product (having already given it a good coat of the Ronseal Wood Hardener) and need some tips on how to work with this filler. Is there any trick to making it spread more evenly and smoothing the surface? The instructions say it can be carved shaped with a modelling knife after 20 minutes, but I imagine that presupposes that one has managed to add the exactly right amount of catalyst for it not to go off quicker or slower, which I have considerable difficulty getting right. Also, there is a piece of window beading which has rotted and affected the wood underneath it. When I replace the beading, I will need to build up the wood underneath it with filler, but presume that the filler will stick to the new beading, so that if I ever have to replace the glass the beading will be firmly attached to the window frame and I will have a devil of a job getting it off. Any tips on how to stop that happening?
TIA
Keith