New plaster, question on brush marks

[Titan7]

My sister had her pool replastered, they were brushing as required but it appears the black plastic on the top of the brush left a few marks on the seat edge of the spa, any suggestions for removing the black marks? Plaster is about 2 wks old, yep, I told them to be very careful, lol.

 

[jblizzle]

They could try brushing it off

Or maybe gently using some wet dry sandpaper. Although I might suggest you ask the plaster company what they would suggest

 

[Meadow]

Our fairly new white plaster is constantly getting black marks along the edges from the robotic cleaner. Brushing alone will not get rid of the nasty marks.
I use dish washing scouring pads and it worked for me. Can't wait for the 68F water to warm up so I can scrub the black marks in the deep end.

 

[Titan7]

Thanks