Does using sandpaper damage external brick

[Michaelsf90]

May be a silly question as I know nothing about brickwork. At the back of the house their where spots of paint on the brickwork. I'm guessing from previous owners painting soffits or something and it dripping. Anyway my missus has decided to use sandpaper to rub it down and off. My question is has anything been damaged? Does brick have like a layer on the top that stops moisture ingress. I don't think she's gone crazy but enough to get the paint fully off. Sorry if this is a silly question I've just no idea when it comes to this sort of stuff

 

[denso13]

My question is has anything been damaged?

No, no harm done.

 

[Michaelsf90]

I read somewhere brick has like a top surface layer that makes it moisture resistant. I'm guessing it needs sand blasting to be too badly damaged

 

[^woody^]

Stop reading there.