How to make the cucumber and lemon acne scar treatment?

I have some light acne scars that just wont go away and its driving me nuts. I want to know how much cucumber juice and how much lemon juice to use and if its ok to just use lemon juice from one of those jars or should i use the juice right from a lemon?How to make the cucumber and lemon acne scar treatment?
You do this too? My friend told me about it and have been doing it ever since! Im not sure if we are thinking of the EXACT thing but what i do is, shave a cucumber (a good amount, or enough to cover your whole face), mix it with flour and a little bit of lemon juice (lemon juice irritates my skin) and mix it together. It forms a wonderful face mask that is cleansing, takes out all the oil and dirt from my pours, and helps cure any blemishes that I have. Good Luck!