Yes, you can add texture to the surface of your paddle. Adding texture can help improve your grip on the paddle and reduce the risk of slippage. There are various ways to add texture to the paddle surface, including using sandpaper, a grinder, or a specialized pickleball paddle texture tool. However, it is essential to ensure that the texture you add to your paddle does not exceed the maximum allowed roughness guidelines set by the governing body of the tournament you are playing in.