While I was cleaning up the engine valley getting it prepped for paint I noticed some slight block rot in deep slots. Have any of you used a product called "lab metal" for filling in the "rotted" spots? They claim it can handle up to 350 degrees and is self leveling. They also make a high temp lab metal but you have to heat cure it at 400 degrees so that one is pretty well out for this task.
Here is a link to the site that makes it:
http://www.alvinproducts.com/Products/Products.asp?id=1