哈哈,估计刚才我回答的一个问题也是你问的.如果是我我会这样写,
As I know, we have also sent you the production samples & wet paint, just as what we done during application testing.
Dear Iris, we can't manange to "spray the paint on the sample" because we cannot control how much paint is sprayed to the sample"
估计你也是外企经常和老外交流的.