HOW MUCH LONGER WILL IT LOOK LIKE THIS?

How much longer will the window frames be white? The builders are due this morning. They're already late. Will they ever turn up?

UPDATE - the builders went to collect the windows this morning but the carpenter hasn't made them yet. The builders are passing blame onto the carpenter, but the builders were supposed to have got the frames last week in order to stain them before they brought them here. Naughty, naughty, caught out!