Yes! We can use the putty knife to scrape paint. However, there are times when you need a power tool to remove your paint easily. Then, you might have to go for other tools. And it becomes essential to remove the old paint before putting the new paint on the wall. Thus, this knife is used for wood filler or joint compound. Besides, its blunt end is best for scraping paint and reduces the chance of gouging the surfaces. However, these fettling knives come with flexible blades, which is ideal for spreading & applying materials. So, you can surely use them while scraping the paint.