A gritty, sandpaper-like texture on a spray paint project usually traces back to one of a few specific causes — application technique, environmental conditions, or surface prep — and identifying which one applies determines whether the fix is a quick adjustment or a full redo. Below are 10 causes to check, along with the specific…

A Rust-Oleum can that won’t spray is usually a simple, fixable issue — a clogged nozzle, an under-shaken can, or cold temperature — rather than a genuinely defective product, and working through these causes in order resolves the large majority of cases without needing a replacement can. Below are 12 causes to check, starting with…