I would normally spend ages getting rid of the horible stuff but in this case i will be adding some. The picture below is the Mercedes C Class interior i bought on ebay. wilst the from seats are easy to fit the rear seat is a little bit more envolved. I have made a fibreglass seat base to support the seat foam. The build details are below. I have now started to make a headliner shell so that i can use modern headlining material.
The seat foam was covered in 2 layers of masking tape as cured fibreglass seems not to stick to it. The resin was mixed with catalyst and spread over the matting. Very messy but i got a very good result. the headliner was made from hardboard that was wetted and clamped in place. Over 3 days the hardboard flexed to the correct shape, i have let it dry out and have used this to apply the masking tape to. Fibreglassing the seat was messy, haveing to apply the stuff to the underside of the room is just bloody awfull. For now i will do limited areas untill i have at leat 1 layer all over. I will extract the liner and complete a second layer on the bench.