Workaround for proofing certain reserved characters and escaping them properly?

[n7s]

We have found that proofing a few numerals is a little bit of a challenge. When we check how numbers behave with special characters like % we can simply escape it like \% but for $ the best I have come up with is {\\$} inside another \proof{ larger text with numbers }. There must be a better way, what am I missing? thoughts?

[alerque]

The $ character is not special in SILE, it sounds like you may be passing it through a shell somewhere. Can you include a whole MWE here that I can replicate the problem? It probably doesn't matter what font, just the workflow you're using to pass proofing content and call fontproof on it...