As far as I know Hyperwash don't contain any wax or anything...just a straight forward chemical shampoo/cleaner. I think you should be able to use D115 as...sort of....a QD-like product to further clean down the surface and shine it up a little more since it got wax in it. Foaming, rinsing (especially using a pressure washer) then using D115 is a good idea. Removing the heavier and loose grit (by pressure washer or normal wash) then only wiping down (with a QD, etc.) is always good as compared to straight away wiping with a 'no rinse'....my personal opinion la...

Regarding IPA. Heard that we can use the glass cleaner as a substitute of IPA. Any sifu here can verify that?

Detailing related...yes. For others, like TamiyaOne said.....

I mean to wipe down...meaning it can replace the IPA? So its still do the job right eventhough not as effective as IPA?