Deck sanding project - what sander do I use?

Hey everyone, I'm planning to refinish my 12x20 deck this spring. It's pressure-treated pine, about 5 years old, with some peeling stain. I've got a circular saw, drill, and basic stuff but no sander. I'm on a budget and want something that'll get the job done without killing my arms. Hand sanding 240 sq ft sounds like torture. Any recommendations? I saw some belt sanders on sale but heard they can gouge if you're not careful. Thoughts?

First off, wear a respirator, not just a dust mask. PT dust is nasty. For a deck, an orbital sander is safer than a belt sander. A 5-inch random orbital with dust collection will save your lungs and arms. If you can swing it, get a Bosch ROS65VC or a Makita BO5041. Use 60-grit to start, then 80, maybe 120 if you want smooth. Keep the sander moving and don't press down. Also, check for nails/screws above the surface—use a punch to set them or you'll have a bad time.

I've done a few decks. For big flat surfaces, you want a floor sander like a drum sander, but that's rental territory. For a DIY, a random orbital with a vacuum hooked up works well. But don't skimp on grit progression—jumping from 60 to 120 leaves swirls. I'd get a variable speed sander to avoid burning the wood. Also, if there's old stain, you might need a chemical stripper first. Sanding alone will clog the paper fast. Personally, I'm meticulous: I use a Mirka Deros with Abranet mesh. Pricey but worth it for the finish.

I've got about 15 sanders in my shop, but for a deck I'd grab my old Porter-Cable 333 random orbit. They're cheap on CL and bulletproof. But honestly, if you're only doing this one job, rent a floor sander from HD. Even a belt sander with a stand can work. But you need experience to avoid digging. Oh, and buy extra paper. Always buy extra paper. Ask me how I know LOL.

Back in the day we'd use a belt sander with a 60 grit and a steady hand. But for a beginner, get a random orbital sander—no swirl marks. I'd get a 6-inch (like a Festool Rotex) if you have the money, but a 5-inch works. Key is to use a vacuum—makes the paper last longer. And don't forget to seal the deck after sanding. I always do a coat of clear sealer within a week. Good luck!