Are you still baffled with a preposition in the phrase "to be made of/from"? Let's clear the air.
Plastic is made FROM oil.
Plane's fuselage is made OF aluminium.
We use “made from” when the original material undergoes a significant change before becoming the final product. Oil is melted,processed and turned into plastic.We don't see oil in the plastic.
We use made OF when we talk about the basic material or qualities of something. It has a meaning similar to ‘composed of’.We can still see or feel aluminium in the fuselage skin.
Some other examples
This wine is made FROM grapes which grow in Crimea.
The plane has to fly and therefore cannot be made out OF super-heavy metals.
The combustion chamber is also made OF nickel and titanium alloys.
