Floor jack placement on M3 and more

I thought I would do the OCD routine on my rims and do a thorough cleaning and waxing with Klasse. I took a quick look under the rear of the car and did not see any obvious lift points for a floor jack. The only thing I saw as a rectangular hollow box like area forward of each rear wheel. Any suggestions?

The other thing I saw was that several areas of the undercarriage seemed to be coated with a yellowish white substance that looked like lithium grease, but applied as if it was an undercoating. Anybody seen this before and know what it is? Or did the dealer run over a grease gun before delivery? The greasy substance is like a grease, not a wax or tar.

I will try to get a better look at it later this week, maybe get the car up on some ramp blocks to see what it is.

Input appreciated.

Rick