Technically, you can use any sharp and strong material to scrape off the paint. It can be a sharp and straight piece of metal. However, if you want to do a good job without hurting your hands, you need a dedicated paint scraper. Apart from a regular scraper, professional painters use other tools such as heat gun, hook scrapers, and wire brush to scrape paint. But a paint scraper is the most versatile tool among all of these. So, if you only want to spend money on any one of these, the best option is to buy a versatile paint scraper with a medium-sized blade.