



Concealing Concrete Drain Pit
Hi all,
I posted not long ago with some plans to update my internal courtyard. I'm happy with the result and looking forward to seeing the ground cover grow in, but open to any feedback/suggestions too.
My current issue is this concrete drain pit. I had to drench it in rust buster to pry the old grate off and clear the pit of all the rocks/junk that had fallen into it. However the result is that the concrete is now more stained.
Can anyone offer any suggestions for cleaning/concealing the oil stains? I tried cat litter and it didn't help much. I was thinking of trying some concrete degreaser but I am worried about damage to the surrounding plants/stones (which is why I've asked here first in a gardening subreddit).
Should I leave it and just wait for the ground cover to conceal it?
First two pics are current (note new oil stains on the drain pit), second two are before.