The house we are in has these rather old timber window frames, skirting boards and internal doors. Window frames in particular are really showing their age, with patchy remains of what looks like old varnish here and there, and making the rest of the house look much older than it really is. The plan is to sand, patch any holes and cracks, sand again, and paint nice clean white - windows, skirting boards and internal doors, so quite a bit there. Is that a done thing, or do people tend to replace instead? - not that I have the budget, so hoping to do with the painting. And What are the best products to use to get a good and lasting result? Thank you!