Will this cart hold the weight of my tools and air compressor?

The steel construction is rated for serious shop equipment. Exact load capacity isn't specified — test with your heaviest single item first, then load incrementally. The locking wheels keep everything stable during use.

Does this come with drawers or just open shelves?

This is a basic steel frame cart with a work surface. No drawers or compartments included — you build storage around it with your own bins and shelving as needed.

Can I paint or coat this before using it in a humid garage?

The bare steel will rust if exposed to moisture. A coat of paint, rust-inhibiting spray, or clear protective finish will extend its life significantly. Prime and paint it before putting it to work in a damp environment.