Jim, I modeled the foam insulated G39a models years ago. First in HO scale, then in G Scale. I looked for my photo files for the G Scale version but couldn't locate the steps I took to apply the insulation. So I looked for my HO photos. I found one with the insulation as it look when first applied. It's included here as well as the two completed models I did in HO. To represent the foam I used woodland scenices ground foam mixed with either clear Elmers Glue, OR, I cant remeber for sure, that medium used to make water falls and ripples in water scenes. I believe it is from woodland scenices as well. Its a thicker, tackier substance. When actually applying the foam mix to the sides of the car I do know I used the water fall / ripple material. Sparingly applied to the car and with a piece of styrene used as a spatula, I applied the foam mix and worked it to get a "sprayed on" look. Once dried I proceeded to finish the model build and weathering. On foam insulated G39a cars the lettering is applied to panels attached to the ribs. Also, if your familiar with the Woolies, you will note the foam eventually failed by flaking off. I represented one car with patches of missing foam. These HO cars, as well as the G Scale car were done I believe in 2004. Everything held up well over the years. Have fun
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