Can I paint over a glossy finished wall with a duller finish without sanding it down first?

It is generally recommended to sand glossy finished walls before applying a duller finish paint to ensure proper adhesion. Sanding the glossy finish helps to create a rougher surface for the new paint to adhere to. Additionally, sanding can also help to remove any imperfections or bumps on the wall surface. However, if you choose not to sand the glossy finish, there is a chance that the new paint may not adhere well and could peel or chip over time. It is best to follow proper preparation techniques for the best long-term results.

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