How do you get brown glue off painted walls

Two old cork boards which had adhesive backs have left sizeable squares of brown glue behind. Hot soapy soak hasn’t worked and if I use the scraper any more I’ll be taking off paint and probably a layer of plaster too.

How do I shift it without damaging paint underneath?

Google hasn’t helped.

Posted By: Old Man, Oct 20, 16:44:46