Sold as ISO 100 "C-41 compatible" film (it's an EASF 125/AN-6 stock) word is you can push Aerocolor IV (sold here as Popho Luminar 100) 2 stops without problematic shifts.
Big thoughts on the Aerocolor +2 push?
Grain gets noticeable, but not excessive. It gets VERY weird with lighting that isn't sunlight (see the dim sum interior shot)
Otherwise this absolutely works as advertised: it's pretty much indistinguishable from a nominal ISO 400 film when shot in natural light.
Shot EI 400, developed in Rollei C-41 (fresh mix of 3-month old concentrate) for 4:20 ~100F which is Kodak's specified push +2 timing despite absolutely no one else on the internet agreeing with them on that.
VueScan scanned as "Slide Film" with multi-exposure at single sample, exposure locked at 1.75 (RGB)/1.5 (IR). 4200dpi
For expediency/consistency's sake, blanket processing in NLP of Cinematic - Log with brightness and contrast boosts (+14,+11) and a little pulling down of shadows and blacks (-11, -14.) I pumped the saturation hard to 10.
Rolleicolor C-41 4m:20s @ 101F (2 inversions per 15s)
Konica Minolta DiMAGE SE5400II => VueScan => NegativeLabPro 2.3

