I’ve been doing the skirting in one of our rooms this weekend. Had to go with MDF to match the rest of the house. Much easier to work with than pine or oak. If you’re painting them I’d say MDF and get them primed form the supplier.
Dipped / primed mdf will save you a shitload of effort. Also, considering how thick the plaster is, natural wood skirting may bow over time as moisture escapes.
Skirting Boards. What say you hive mind? MDF, Pine, Oak?
How tall, how fancy?