I think I'm gonna do the stains testing experiment for my srp. but i heard a lot of people did it last year. so it's not exactly unique/different :(
I could either test:

- different types of stains on the same type of material. e.g. wine, chocolate, oil etc. on a plain white cloth

- the same stain on different types of material. e.g. oil on denim, plain white cloth and silk?

- or both <--- i want to do this one but it means more work