try rolling on some thin mud and as it drys pat it with wet sponge. if a noob tries to spray that in its will most likely be a mess. whatever you do, make sure to wipe it off before it drys so you can start over. a texture like that is very hard to match in. if you get close consider your talents to be better than average. wish you the best luck. try the roller deal i suggested. trial and error is the name of the game when your in this situation.
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