you will destroy the wool that will happen for sure.
The acid will burn a hole through the material.
A gentle abrasive, like tooth paste and cotton wool, will do that. However if you insist on acid, you can add to the cotton wool any acid, because the tarnish is silver sulphide and the acid will convert it to hydrogen sulphide, a gas
I am not sure but it might be alkali pH.
Depends on whether you leave the steel wool in the Pepsi. If you take it out, the water in the Pepsi will cause the steel wool to rust away. If you leave it in, the phosphoric acid will slowly dissolve the steel wool.
catches on fire
These substances are dyes applied at low pH, generally on wool.
Because the surface area of iron wool is higher, the area exposed to acid is higher.
Fe + H2SO4(aq) -> FeO + H2O + SO2
By answering this question I'm assuming you meant steel wool? Vinegar is a weak acid but exposure over extended periods of time will cause corrosion to metals.
Sure. Felt is made of wool. A magic marker will work as will any protein (acid) dye.
The material used could be made of wool and the dye that can be used is Acid Dyes. In case the material is made of blends of wool and polyester, the dye to be used will be Acid Dye for wool and Disperse Dye for Polyester. In case the material is made of cotton, the dye is Vat Dye and if blends of cotton na polyester, the dye to be used will be Vat Dye and Disperse Dye.