AFAIK those "bead glues" work on a completely different principle where the sheen on the individual beads is a water-activated glue and so the finished piece needs to be sprayed with just clean water to adhere the beads together.
There are a number of "weak glues" known which could be worth a try:
thick sugar syrup (naturally water soluble, thus removable)
You can increase the "clutch" power of bricks by sandwiching a piece of paper towel between each connection. Once the bricks are together, cut away the excess paper using a knife.
The effect of this is roughly the same as applying a weak glue. Your builds will not become impervious, but will hold up better to handling and hanging.