corner blocks

HI everyone, Am sure everyone must have had this issue but for the life of me, I haven't been able to find out how i can clean, hide the dirt and plaster stuck in the corner of my window. Also, there's some existing stuff thats been stuck and i've tried sugar soap, white spirit, UD40 and...

Hi folks, could I ask for your opinion please? I have a period property, and I'd like to fit my architrave with corner blocks and plinths. However, our dining room has two doors, both with their door jambs pretty much against the next wall (please see the attached photo). I've seen this problem...