Red Rot

[JCBone]

I noticed that there are a bunch of tine redish pinkish specks with white centers on my bell. Is this red rot?

[Bonearzt]

Probably not.

Red rot has dark red/maroonish centers, and is usually found in the crooks where moisture tends to sit.

[harrisonreed]

A picture is worth a thousand words

[JCBone]

A picture is worth a thousand words

I'll try to attach one but I'm not sure that my cheapo phone camera will be able to pick it up

[JCBone]

This is the best I could get

[harrisonreed]

That looks like scratches and pitting, but definitely doesn't look like red rot.

[JCBone]

I'm specifcally talking about the 2 large spots that appear kindof red

[harrisonreed]

It looks like a scratch (blue line) that flaked a bunch of lacquer off with it (yellow). Is there at texture difference at that spot?

Screenshot_20210210-075807.png

[JCBone]

It looks like a scratch (blue line) that flaked a bunch of lacquer off with it (yellow). Is there at texture difference at that spot?

Screenshot_20210210-075807.png

yes. there is a texture difference

[hornbuilder]

It isn't red rod. The lacquer has been compromised, by a scratch. It probably won't get any larger, and is not really an issue. Difficult to repair without doing a complete respray.

[tbonesullivan]

Looks like a possible bit of acid bleed, or something similar. I believe red rot is not really something that occurs on bells very often, if at all. It's really something that happens in the areas of the trombone that stay wet, like slides, crooks, and such.

[hornbuilder]

Right, this is more "acid bleed" than red rot. The acid in this case is not from flux, but from the environment the horn lives in. Even just humidity can cause such a discoloration.