Tim Donovan
Hi Catherine, The best way to get good walls without plaster is to have some very good quality think lining paper to cover and hide imperfections ! By no means as good a finish as a freshly plastered wall but saves huge amounts of work! As if original plaster I'm 99.9% sure that the plaster would need to be removed and boarding and plastering a very messy dusty job however a common aspect of most period property refurbishment. I can offer all services to complete your job . Regards Tim