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Well I'm a little bummed out. With my restoration complete except for a few small details, I've taken her out for a couple ten mile rides and sadly noticed that my engine; the case halves specifically, have begun to discolor from the heat. 
In the picture, notice the color of the middle gear. Then look at the color of the case, just below the cylinders. They were both painted with the same products but obviously see different operating temperatures.
To prep for paint, I pressure blasted the case halves with glass bead which yielded a beautiful raw but smooth finish. Then they were pressure washed with de-greaser and water at 180 degrees. Once dry I primed the cases with PlastiKote 228 grey engine primer. Followed by Dupli-Color DE 1615 Aluminum, followed by Dupli-Color DE 1636 clear. All of these products are 500 degree engine enamels.
I suspect my problem is the DE 1636 Clear. I only say that because the cylinders are painted with PlastiKote 207 Aluminum with no clear coat and they look great and no signs of dis-coloring. Who knows, I just hope it stops and doesn't continue more dis-coloration. I haven't even had it out in hot temperatures yet. I won't be doing anything to correct it for a while. Looking back I should have baked the cases in the oven to see if the color would hold and maybe I would have made this discovery at that point... Would have been much easier to correct. Restorations are a big learning process aren't they!
In the picture, notice the color of the middle gear. Then look at the color of the case, just below the cylinders. They were both painted with the same products but obviously see different operating temperatures.To prep for paint, I pressure blasted the case halves with glass bead which yielded a beautiful raw but smooth finish. Then they were pressure washed with de-greaser and water at 180 degrees. Once dry I primed the cases with PlastiKote 228 grey engine primer. Followed by Dupli-Color DE 1615 Aluminum, followed by Dupli-Color DE 1636 clear. All of these products are 500 degree engine enamels.
I suspect my problem is the DE 1636 Clear. I only say that because the cylinders are painted with PlastiKote 207 Aluminum with no clear coat and they look great and no signs of dis-coloring. Who knows, I just hope it stops and doesn't continue more dis-coloration. I haven't even had it out in hot temperatures yet. I won't be doing anything to correct it for a while. Looking back I should have baked the cases in the oven to see if the color would hold and maybe I would have made this discovery at that point... Would have been much easier to correct. Restorations are a big learning process aren't they!
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