Hi All. The previous owner of my property had a wooden car porch connected to the gable end of the property. To make it water tight they used what I think is bitumen. SEE PIC Does anyone know of a way I can remove the black stuff?? I don't want the bricks chopping out. I want to clean what I can off. Also what is the best way to get rid of the red paint which can be seen lower down?? Thank you all in advance.