From Squirrel's Lair
Masked Sandblasting is when parts of the object being sandblasted are shielded from the abrasive. There is purpose-made shielding material liks Anchor Blastlite stencil, but even plain Vinyl Cut adhesive vinyl will work for a light blasting.
Masked sandblasting doesn't have as fine of a resolution as Laser Cutting or engraving, but doesn't have some of the line artifacts that a laser engraving has. Also, masked sandblasting can have an interesting effect as it reveals different properties of the blasted material, such as the grain in Sandblasted Wood.
Click any of the images for more about that project.
Recycled jar labelled by Masked Sandblasting using vinyl mask.
Wood with grain exposed through Masked Sandblasting