There are some forms of wax that melt at a higher temperature, if you find that you need a little more pain to help the urges. High paraffin pillar candles (the ones that stand alone and melt slowly) melt at 130° F, minimum, and is probably the highest temperature wax you can find easily online.
Amazon carries a nice cheap option that I occasionally use for wax play at munches. One of these candles will usually last up to two full-body sessions (usually neck/shoulders to ankles) so if you use them on yourself they'll likely last even longer.
It does look quite like cat scratches ...
A girl in school once asked me "Do you cut yourself?", but back then it really were only cat scratches... so i was like "wtf, no, those are just scratches from my cat".
But idk I think the scars I have now cant be disgused as caused by a cat... http://weheartit.com/entry/49844447
[the link is just a quote btw]