Phil and Karl, you would be very surprised what you can get "off the shelf" in French supermarkets.
As with most supermarkets there is a DIY section, but the French seem to have a penchant for a chemicals section as well.
Ammonia, acetone, cellulose thinners, hydrogen peroxide (MEKP), denatured alcohol,hydrochloric acid, its all there for the taking. Rather nicely some of it is even kept in a glass fronted fume cupboard. All products are always above toddler height, i would say 4 1/2 foot min to top shelf so no issues there.
Was certainly an eye opener when i first saw the selection.