When and how should someone practice Patikulamanasikara meditation (reflections of replusiveness)

The practice of Patikulamanasikara, or loathsomeness of the body has intrigued me for quite a while but I was always uncertain of how to do it right. So, here goes: How do I know if it would be a right meditation for me and how does one start? Yes, I can find the sequence of words: Hairs of the head, hairs of the body..etc. But does one first memorize the whole section or is possible to meditate while using notes?