hello everyone, glad to be a member as im a keen plaster myself. I have done a lot of through colour render and havent had that much experience with inside work. i had a reskim to do with old walls the other day, i took all wallpaper off gave the walls a good brush and then gave them two good coats of SPR, i waited for it to go tacky then gave it two coats of skim. some walls turned out ok but some cracked. does anyone know any better methods to make it stick?