Thread: Strange bubbly kind of blade surface

today i got a razor to hone from a fellow from a local forum. when i got it i saw (besides being worn a bit and having an ugly bent nick on the enge) that only 1 side had sth like pitting but not quite, the affected surface had some sort of bubbly surface,.. kind of made me think someone was trying something agressive in order to clean the rust (there i ssome deep pitting too)

there is no rust on it, no low grits grooves, no visible cell rust, the spine has only pitting on since someone probably honed it after this bubbly thing had ot hapen

any thoughts on what might be the cause of this?