Originally Posted by Jeff Wills

1: material inside the tubes is probably remnants of mold release, typically wax of some sort. Harmless.

2: all I can see in your photos is carbon "weave". This can be in a variety of patterns, or completely random. As long as the surface is smooth and unbroken, it's fine.

I was visiting family in Southern California over Thanksgiving. It was sunny and mid-70's. Go ride, you lucky basstid.