Okay I give up. What do you use to hang pictures on the walls of a travel trailer??
I've tried command strips, industrial strength Velcro, and museum putty.
I have visions of a nail gun in my future......
Heavy pictures in a frame will be a problem. We used prints made on canvas or acrylic frames. Those stayed up with the heavy duty command adhesive Velcro-like strips. It will also only work if the fabric covering your walls is bonded on. Otherwise the fabric can come loose.
We used the heavy duty command strips. They are good for around 16 lbs., and we used two on each picture. However, we put up mostly 5x7 pictures in "frameless" frames (really light). We hung one 8x10 litho that was matted and framed in a light wood frame. Everything has been hanging for around 6 months of us driving around the country without a mishap.
Command strips work great IF you clean the wall properly , prep the wall using rubbing alcohol on a cotton swab then use the 3m command strip but also make sure you have the right size, i have a clock and a picture hanging on them for the last 5 years no issues
I usually remove my wall hanging during travel that I use a command hook for and lay it on one of the beds. When installing command hooks, it usually says to wait an hour before using the hook. If you didn?t wait, maybe the installation did not work properly. Also, after initial sticking of the hook, there is a 30 second press and hold of the sticky strip before reinstalling the hook.
Hope you find a solution! I would just remove the wall hanging(s) while in transit.