Most of the time I wind up puttying windows its heritage jobs for museums or listed properties and trad putty is specified by the pedants at English Heritage, no point arguing with them as you'll get nowhere. I always find it amazing how many people get grossed out when you spit on your hands before you start working with that stuff, I am also frequently amazed how many people don't feel confident using it - even galziers.
Couple of weeks, basically as long as I can. It's not too bad if you're gentle with the brush and leave it to form a decent skin. Quite often though I'll spray (with linseed oil paint) which means that disturbing the putty is less of an issue.
Most of the time I wind up puttying windows its heritage jobs for museums or listed properties and trad putty is specified by the pedants at English Heritage, no point arguing with them as you'll get nowhere. I always find it amazing how many people get grossed out when you spit on your hands before you start working with that stuff, I am also frequently amazed how many people don't feel confident using it - even galziers.