Vu at the PCA has a good video fr the 986 bumper removal and radiator clean up.
https://youtu.be/TG2PaZJMph4
Definitely worth the effort to move the front condensers and clean behind them. I used a vacuum through the from t grills previously but no way was it going to get the junk in between. Lots of organic material. Be careful pulling off the from t bumper as you may break a bumper support if they are old. Cost me $55 for a new support from the dealer. I took advantage of the effort and repainted my bumper and grills.