Painting is one of the cheapest and easiest home makeovers out there—no knocking down walls, no pricy appliances. Just you and a brush stand between you and a whole new look!

And yet: While painting may seem easy compared to a full kitchen overhaul or erecting a new half-bath, it’s not that easy. This may explain why many people attempt the DIY route with painting, but then quickly start grumbling that there’s a whole lot more to it than what they show on HGTV.

Think you’re ready to wield a brush and roller? First, consider these eight things that are bound to go wrong when you paint a room.

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