Rit 88360 8 Oz Denim Blue Liquid Dye (Pack of 2)

Can it be used on fire resistant clothes? a.k.a "fr", or will it break down its resistance?

I have a couple small spots where I splashed bleach on jeans. Can this be used as touch up on the spots?

Would this work on canvas sneakers? I spilled bleach on one of my tan sneakers and want to dye both so I can wear them, since they are practically new

Will this dye cover up a patterned curtain making it a solid color.