Messed up: caused superficial marks on brand new plaster

We just had our pool remodeled. Plaster is about 30 days old. We had a big storm here so I used the skimmer net to pick some leaves up off the bottom of the pool. Well turns out the skimmer net I was using had some wear spots on it with metal showing. Must have contacted the plaster surface because now I have what looks like grey stretch marks all over the bottom of the pool.

How bad is this? How much of a PITA is this going to be to fix? Do you use a pumice stone to run these marks out?
 
Brushing might get it out. You can use a stainless steel bristle brush if necessary. Get an 18” wide one.

Brush vigorously with a regular plastic brush. Brush with less force when using a stainless steel brush.
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.