Just a little mathematical addendum.
Our scale is one dimensional only at 1/32
For area, it is actually 1/32 of 1/32 = 1/1024
For volume, is 1/32 of 1/32 of 1/32 = 1/32768
As volume determines mass, via density, 1/32768 applies to mass also.
Multi-dimensional thinking tends to confuse the issue though.
Hence, despite Spanish origins, people like Dali and Picasso were not big in slot cars!
The net result, in connection with the original post, is that, all other things being equal, the aero effect is reduced by around 1024 times when applied to a 1/32 scale car compared with its full-size brother. ie not a lot!