I wouldn't. Aluminum conducts heat too well. That's why you use something like a thick, quilted cloth or even felted knitted potholder made from wool that will shrink.
That may happen if heat is dissipating from the tin foil faster than it can be generated. Insulating the tin foil and/or blocking any wind from cooling it should yield...
Anodized aluminum should be cleaned with a gentle substance, such as a mixture of dishwashing soap and water. Scrub the anodized aluminum with an abrasive sponge and rinse thoroughly. To...