Hi guys , I was after some help regarding the rend aid product . I'm in the process of starting an old stone cottage and obviously the lack of key on the big stones was a problem so the customer has bought the rend aid product to save me slurry coatin it and taking 10 years to scratch it lol . Just wondering would it be ok to paint the rend aid on all over the big stones and joints ?? Then scratch with S+C as normal . The bag says to apply it but if I applied it he'd need a load of bags , we can't roller it on obviously because the stones are all uneven .so we were hoping to paint it all on ? Any help would appreciated thanks