Yes, the sour creme spoon should be treated as a brush on the palette.
It'd be weird to screw up the sc tho, since when they wrap it all up it gets mushed together.
I always opt for my hot sauce on the side in one of those clear cups and apply it myself with a fork before/after eact bite, that way on of the Chipolte minions like KatKid can't screw up my sauce allotment.