How to remove mortar from repointed brickwork

As mentioned above use brick acid/mortar cleaner. Make sure you use rubber gloves as it will burn/irritate your skin. Once applied use a wire brush to help clean it off, but press lightly. If they have used smooth bricks eg engineering bricks use a cloth instead. Hope this helps.

Best option is to use brick acid ,mortar cleaner

As the guy above says but use a paintbrush to apply the diluted acid and use only on the brick and not the mortar joints. leave to soak a few mins and use wire brush or scraper to remove.

You can try some brick acid.

You should use some high strength mortar cleaner, with the X on the container available from builders merchants, a scrubbing and wire brush. The mortar cleaner will need to be diluted , normally 1 part cleaner to two parts water for stubborn stains mixed in a large bucket. Hose wall down first, place down something to protect floor then , ensuring your wearing adequate safety gloves and glasses, apply mortar cleaner, using a bash scrubbing brush, avoiding the joints and concentrating on the bricks. Use wire brush on hard stubborn stains. Leave for ten minutes after finishing, then hose off entire area. This can be repeated, however if completed too many times , will change the aesthetics of the brickwork. Its potent , so treat cleaner with respect to avoid injury s.

First of all I would apply some brick acid to break down the mortar then scrape it off but be careful not to apply to much acid as it can stain the bricks

Number of methods you have diluted brick acid with stiff brush and rinse off after be careful of other mortar You can on some brick rub another brick onto it then dry brush Or call a hot jetwash company if it very bad to clean it off like the new builds