I have just done a complete front end rebuid on my caravan,and at the front inside is 3mm ply,I have papered this and i must admit it looked good,(I used Solvite Extra stong all purpose wallpaper adhesive)when the paper dried i just peeled the paper away from the boarding as if i hadnt used any adhesive,Now thats my problem what did i do wrong,will it help if i paint the boarding first,and do you paste the wall or the paper first, or both,Many thanks,