big stick: I have been on my share of Hunts to Alaskas rainy SE area and my Leupolds have all served me perfectly well on those extremely difficult condition Hunts!
That aside why on earth would you take several of your Rifles outside in the rain, lay them on wet rocks and have the actions opened so rain water and moisture can get into the breach and the nooks and crannies of the bolts, actions etc?
Sheesh.
To each their own I guess but from someone that does something as bizarre as depicted in your photo I think "I" will consider advice from other than you!
Again, SHEESH.
Hold into the wind
VarmintGuy