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