We have an outdoor kitchen in our new house and the benchtop and cooker sits against the brickwork on the back of the house. We do a lot of wok cooking and this generates a bit of cooking oil splatter. To the side of the cooktop is also a brick windowsill (built with bricks laid at an angle).
We had originally planed to run a sheet of stainless steel up behind the cooker to the bottom of the rangehood but I think the oil will slowly also build up on the windowsill and as it will penetrate the brick it will stain.
We have an other idea to tile the splashback and also cover the windowsill and may still go with that.
Our exposed aggregate driveway has just been sealed and we have some clear sealer left over. I was wondering if we could just use this to seal the bricks and have a brick splashback. Has anyone ever seen this done? Will it seal the mortar or just soak in? Will the small holes in the brick face be repositories for cooking oil?