Wud'up everybody!=)

I need your help, fellas.
I have some scratches and cracks in my front bumper and wanna repair it by myself.
I am a chemist and I work in this field so I have plenty of raw materials to make a perfect repair putty.
But the question is: how to remove the front bumper?
I ask those, who have already proceed this. I saw 4 screws just under the fan, but I'll greatly appreciate if you tell me the sequence, tools needed, whether will I be able to do it by myself.

Greetings from Russia+)