Hi. Most modern water based emulsion paints are latex Or vinyl based for durability. They’re only partially breathable but designed specifically for high traffic areas. Most reputable paint suppliers offer breathable or semi breathable paints tinted to a colour of your choice. The latter would be more suitable for lime plaster for longevity. Should you decide on a latex based topcoat, it will just sit on top of the wall without soaking in and breathing fully as required. My company usually fills and machine sands any imperfections and apply high grade, thick lining paper horizontally. This is the correct method however as we have pasting machines it’s a quick process for us, domestically however it’s hard work and time consuming. If your house is not high traffic in relation to kids and pets, I would use a breathable paint as stated above. Otherwise latex based should be fine for durability, but due to the high latex content the touch up capability is poor for highly lit areas. Any touch ups you carry out for marks on the walls will stand out heavily.