to which 是什么从句，麻烦翻译下~

In adiition to hacing a pleasing color,a paint must protect the surface to which it is applied and be easy to apply in a thin,uniform coat.

其中我想知道it指代什么，而to which在其中是引导什么从句的~~
谢谢各位高手指点呀
In adiition to having.
taping wrong。。。

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it is applied and be easy to apply in a thin,uniform coat.
--it 指形式主语，指代to apply ......

which引导是定语从句，碰雀它在从段吵唯句握培里指代前面的surface,至于用to ,for ,in ....我先还原这个从句再说吧

it is applied and be easy to apply in a thin,uniform coat to the surface

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定语从句
to which是把介词提前简早搜了
本来to是给Applied的
词组睁正Apply to

介词提前的情况很多的
LZ得好好积累了拦历

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it 指前面的 a pleasing color

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应该是which it is applied to
只不过是把to提前了而已

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