I have a hardboard or high density fiber board siding on a detached garage. I’ve replaced the lower 2 courses with a cement product due to deterioration. The siding is painted with what I believe is an oil based product. While the siding seems solid The paint is not. I’ve scraped a bit and when the paint comes off it brings a layer on the siding with it. This leaves a rough surface. Not sure how to deal with this. I don’t want to replace all the siding. Suggestions on how best to deal with this would be appreciated. B985F40F-23C9-4001-B5FA-02B929E617C2.jpg55B7CF4F-16B4-4CC5-B6F7-7D65CA7BF4D8.jpg