i use photogrammetry with great results no matter the scale of the object.
i have 3d scaned from 3 meter high statues to 5 cm busts ,with consistent results
otherwise you have to buy different scanners for different scales..
which can be really expensive and also a nightmare when it comes to post cleaning your 3d mesh
Regarding cleaning the 3d scan ,if you know how to scan using photogrammetry there is minimal to none cleanup you need to do..