I use a 2" carbide blade scraper I bought at Lowe's. I'm sure that Home Depot will have the same, or similar, scraper. The blades are replaceable. You might use from 1 to 3 blades (if you're messy like me) on a boat. The scraper costs around $12 or $13 with blade. The replacement blades cost $4 to $5, but are certainly worth it. I use a scraper much more than sandpaper. You can use the scraper on fairly green (24 hours) epoxy, but you have to let the epoxy cure before you sand.