I will be repainting the bonnet of my S1 this winter. At present the under bonnet (hood) insulation is a fibrous material with reflective foil finish which IMHO looks too flash and brash for the car. I am trying to find a subdued alternative. Hardura and straight felt are available but I am told these are non fire retardant and presumably therefore a fire hazard in the engine bay. Having said that I see a web site which promotes the use of Hardura as follows:-
As used on the early Jaguar XJ6 and Minis.
Can be used under bonnet, engine bulkheads or extra noisy areas where a wipe clean surface is preferred.
Now I am undecided.