This is a fantastic blog to follow if you are a genealogist!
I can also add that this particular blog post on "UpFront with NGS" provides several pearls of wisdom relating to the subject of what to do to when it comes to trying to read the unreadable tombstone.
The article addresses the do's and don't's; sharing good reasons to support the fact those don't's are important and need to be taken seriously if we are to not harm the inscription of a tombstone and its surface, or not jeopardize the integrity of the tombstone itself.
We take a lot of time visiting burials grounds and locating lost gravesites only to be saddened by the sight of an ancestor's gravestone that is less than readable. We wonder what we should do next? Please wonder no more as this article is spot-on (as the British would say!) for spelling out wise advice to help you be able to read the inscription without harming that gravestone you also desire to protect for future generations who will, like you, enjoy visiting the gravesites of their ancestors.