Copper gas line touching aluminum frame problem

time2roll wrote:
Looks like the copper is up against a wood spacer. Give it a yank to move them apart.

I see what looks like some grey sealant on the wood spacer but where is the aluminum frame?

The aluminum is sandwiched between two skins of wood. The "grayish" color is the aluminum. The aluminum seems to have a coating of glue on it.
I can't just "yank them apart" because the copper tubing is rigid and attached to the frame.