It appears that the cement portion (not the aggregate) is typical white plaster. While the quartz aggregate is mostly blue.
Am I correct or not? Do you know if a blue color pigment was added to the plaster mix?
In any event, I see what you are concerned about. The quartz aggregate exposure is not consistent or uniform. However, it generally never is because of how difficult it is to expose the quartz aggregate uniformly without causing other damage.
I suggest to purchase some 80 grit Wet&Dry sandpaper and sand the areas that have the most "cream" to see if you can make it more uniform. I strongly suggest that you do not do an acid treatment in an attempt to rectify. It is better to have some cream (cement) showing than the opposite, which means the surface is rough and overly exposed.
Am I correct or not? Do you know if a blue color pigment was added to the plaster mix?
In any event, I see what you are concerned about. The quartz aggregate exposure is not consistent or uniform. However, it generally never is because of how difficult it is to expose the quartz aggregate uniformly without causing other damage.
I suggest to purchase some 80 grit Wet&Dry sandpaper and sand the areas that have the most "cream" to see if you can make it more uniform. I strongly suggest that you do not do an acid treatment in an attempt to rectify. It is better to have some cream (cement) showing than the opposite, which means the surface is rough and overly exposed.
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