How to darken / heal bright spots while retaining texture

[tommik128]

I struggle to find the proper way of darkening or healing the spots on a scanned image. I have tried using Colors - Levels and also Filters - Enhance - Heal Selection. But the results are not convincing. I either get improper brightness in comparison to surroundings or the texture in those spots is kinda blurred / damaged. I would like to retain the source texture just have the spots to get darker so that they match the surroundings.

Thanks you for your time.