I have rosacea, should I do facials?

Nothing abrasive. As long as the facial does not involve any microdermabrasion, glycolic or salicylic or other fruity enzyme acid peels. Anything potentially abrasive with exacerbate your rosacea.
Vary . Although I do not see a contraindications, it depends on the techniques used. I would advise avoidance of microdermabrasion due to the vacuum which can make the vessels appear more prominent.