Thanks Stuart45. Just wanted to double check and I'm glad to know that lime is relatively heat resistant and I that can apply it on two coats. I'm looking forward to my small project. Just two final questions, could I buy hydrated lime from my own local builder's merchant or is it best to get it from specialised lime suppliers such as for example www.lime-mortars.co.uk or www.mikewye.co.uk? They just quote that lime needs to be at least 3 months old to reach maturity before being used. Could I also use normal emulsion paint or does it have to be a lime paint? Many thanks!
http://www.lime-mortars.co.uk/lime-render/non-hydraulic
http://www.mikewye.co.uk/mikeprices.htm#limeplaster
http://www.lime-mortars.co.uk/lime-render/non-hydraulic
http://www.mikewye.co.uk/mikeprices.htm#limeplaster