I'm just ordering some panel wipe and find that there is a slow and fast version of it Surely you would only ever want the fast version so it evaporates fast and doesn't take ages to get rid of? when would you want a slow one?
I prefer the standard version, the fast is really fast and flashes off before you can wipe it
Like lots of things there are fast and slow to suit conditions
Fast is alcohol, slow is like white spirit. The slow gives more time to degrease a surface, but tends to leave a film behind that then needs cleaning off with the fast.
I find the fast is just like spray brake cleaner, the slow is the same as Zippo lighter fluid. Always the slow for me for panels, though I do get the fast as well as it's very handy to have around and cheaper than brake cleaner.