had a friend that did a 4x4 wall like this for one of her art sculptures, dont know what recipe she used, but do know the mold was mostly chicken wire over a 2x4 frame because it was easy to mold and work into rough shapes resebling rocks and then layed the paper mache over that, here are some ideas i found from variouse sources on the internet (just googled it) for sculpting or wallpapering or outdoor sculpturing with paper mache recipe,
www.ghoulfriday.com/paper_mache_paste_and_pulp
1 c. Flour
1 c. Corn Starch
1 tbsp Salt (to deter mold)
1 1/2 c. Water
1 c. White Glue
outdoor paper mache
www.papiermache.co.uk
Re: outdoor papier-mache
I am a papier mache artist and have had no problem with outdoor papier mache. If u use an armature of a non-porous material (plastic, chickenwire) and cover intially with strips of newspaper with plenty of PVA glue, then cover with paper pulp (again with plenty of PVA glue). Finally when project is completely dry, again paint over with a good covering of undiluted PVA.
I buy trade quality PVA from the builders' merchants - children's PVA will not do!
I have had sculptures in the garden for several years with no signs of deterioration.
__________________________________________________ ________________________
keep researching, i think its a great and original idea
Hope this helps.