Yes, floral is ok. Although there have been instances where the wire left some rust in the cake, but the ones that are wrapped in tape and that green wrapping are ok, but depending on the type of wire… You can also attach those wires on one end of a skewer or stick them into straws and stick the skewer or straws into the cake if the naked wire idea frightens you. Sylvia Weinstock, Ron Ben Isreal, and Nicholas Lodge does that all the time and they are the masters of gum paste flowers. Don’t worry about it. I have done them too.
here is a discussion about this: