Yup bare foam's a bugger on copper. Not only does it attract moisture, but there is a certain amount of out gassing as it ages/decays.Marty said:Weather is crappy here so I took the time to clean my recent aquisition Porsche T-Jet.
It did run when tested, only hummed. The corrosion looks typical of T-Jets stored in the original cases with the foam. BE AWARE!! - THE FOAM RETAINS MOISTURE!! While it looks cool to have the original packaging, it is harmful to the cars.
Marty
Try modern automotive headliner material available at any good upholstery shop. It has the correct width foam on one side and a very soft synthetic cloth liner on the other. I use it cloth side up. It's like the stay dry liner in your rugger's "Pampers". I've been using black as I find it stylish and practical. It doesnt show the inevitable grease spots and tire smudges.