Is this repairable? Shimano Lever Content

There’s an awful lot of insidey stuff on the outside…

I can’t really see what the issue is – do you have any other pictures?

Crap photo 😁

Blown piston seals I’m assuming. YouTube videos and eBay kits. If you bin the lever, strip it first for hard-to-source consumables like the plastic piston guides:

Shimano Brakes – Piston Guides Cracked Plastic – ServoWave

have you tried putting new insidey stuff back inside?

I could really do with a new pair of Shimano Brake levers. I keep looking for a decent deal. It might be cheaper to buy some Clarks ones.