Hi everyone. Two questions: Do I need to thin my acrylic Tamiya paints, or just use them straight from the tin? Also, when the Tamiya model instructions say something like: "XF-7:5 + XF-9:1", what does it mean? I appreciate "XF-7" and "XF-9" refer to the colours, but what does the :5 and :1 refer to? Does it mean I need to mix XF-7 and XF-9 in the ratio of 5:1? Thank you.