caulking

Hi, Had plastering work done recently and at the time he also put up new coving to match existing coving (we had built in wardrobes when we moved in, took them out and there was no coving behind). When he installed it he told me that cause the old coving has been painted on so much over years...

I've had some new skirting fitted and I need to caulk the top edge against the wall as some quite wide gaps exposed. My intention is to use clear varnish on the skirting and a white silk emulsion on the walls. Which order do I paint and caulk the walls and skirting. Do I apply the varnish to...

I've just built a TV and fireplace recess unit using mdf. Some of the mdf boards were cut to short and there is little gaps between some of the mdf boards within the shelving unit, should I just use caulk to fill up the gap or would I have to use wood filler? Also where the mdf boards meets...