All marks on an old tool up for restoring act as a visual record of its history.
for outdoor tools, pitting from rust is a common mark maker.
sometimes these marks show abuse and sometimes they just show a tool's life lived to the fullest.
if too deep then rust can be a killer for tools
it is important to make sure that if a tool is structurally sound before using (a vinegar bath is the system i employ to remove all of the rust, but there are other methods out there. the removal of all rust and debris exposes the tool for a complete obstacle free inspection).
here is an example of a double bit axe that had a fair amount of rusting
none of the rust was shallow enough to make it an excellent candidate for restoration.
|Plumb double bit axe showing strong texture from rust but is completely sound and will make an excellent striker.|
this Plumb double bit will make an excellent striker: full of history, full of potential.