Locate cheek binding, bottoming tongue or insufficient outer-tenon clearance before removing wood.
Level the raised material on a cooled ABS repair while preserving the original panel contour, then decide whether remaining low spots need filler.
Decide which acrylic edges need accurate bonding surfaces and which can be polished, before rounding a joint or adding flame-polishing stress.
Use stationary inspection to separate end-grain tearout from sanding scratches without thinning the rim.
Teach apprentices to describe sanding marks, find surviving coarse scratches, and justify the next step with a small blinded exercise on bare wood.
Remove hardened epoxy drips beneath a tabletop with controlled cutting or supported sanding. Preserve the visible wrapped edge and stop before enlarging the repair.
Prepare new drywall seams for adhered fabric wallcovering. Remove ridges, preserve the board paper, and check a covered sample for shadows and show-through.
Calculate strip yield from a 9 x 11 sandpaper sheet. Compare layouts, allow for grip length, and make a cut list before buying or cutting.
Use a mock corner to detect exposed abrasive edges, rocking support and an unsafe stroke before sanding a grid.