How many rockets does it take to destroy a sheet metal wall?

Sheet Metal takes 8 rockets, Armored takes 15 : playrust.

Read rest of the answer. Then, how many rockets are needed for a stone wall?

four, but logically as few as one, since four rockets can take out four walls if placed correctly.

Beside above, how many c4 does it take to break a metal wall in Rust? The raw materials required for crafting a C4 from scratch are: 2,200 Sulfur to make Gunpowder and Explosives. 3,000 Charcoal to make Gunpowder. 200 Metal Fragments to make Explosives.

Secondly, how many satchels does it take to break a sheet metal wall?

It takes 4 satchels to take down a sheet metal door, you can decrease the cost a little bit by using 3 satchels and 3 beancan grenades but it's not really worth the time and risk of the grenades just blowing up immediately in your face. It takes 10 satchels to get through a stone wall/foundation.

How many pickaxes does it take to break a stone wall in Rust?

The hard side takes 3 hatchet hits to do 1 point of damage. Stone walls from the outside take one damage per 8 pickaxe hits, but from the soft side takes 1.2 damage every hit (7 pickaxes for one stone wall).