One of the papers from the 'past' (but still quite actual...I think) and maybe of some interest to various communities.
A system in which one adherend had two types of surface treatment was tested using a wedge test.
Simple polishing and polishing with subsequent sandblasting were the
treatments used, with a distinct straight line, perpendicular to the sample edges,
separating the two. Despite the clear-cut difference in surface treatment, smooth