Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to strip wood finishes [title] Wear a dust mask and protective goggles. [step] Sanding old paint or varnish releases minute dust particles into the air that can irritate your eyes and lungs. [title] Use coarse sandpaper to sand with the grain.

Ending1: [step] Use a sanding sponge or wrap the sandpaper around a sanding block when stripping flat surfaces to ensure a smooth finish. [title] Switch the sandpaper to a medium grit once you begin to see the wood grain showing through the paint or the varnish starts to dull. Ending2: [step] Start with 240 grit sandpaper and then get lower. At about 350 grit, follow the grain pattern. Ending3: [step] You can also use a 120 grit sandpaper if you don't have it at home. [title] Cover all areas you plan to prime once you begin. Ending4: [step] Coarse sandpaper, available from hardware stores or online, is the best-grade sandpaper to shave grain from the wood. It is textured with tiny particles and can typically be found at hardware stores.

Answer format: ending1/ending2/ending3/ending4