Midnight Shadow, to prevent burning from wee you would need something to form a barrier. However, if you are allergic to paraffin that limits you a bit. What about an oil-based moisturiser like Yes OB or Olive & Bee? You would at any rate be best using something with as few ingredients as possible to avoid further irritation, with no nasty chemicals. I'm not sure if Vagisan falls into that category. Olive & Bee, for example, contains just olive oil and beeswax. If you join the Vaginal Atrophy Facebook group you would get plenty of ideas from there, as quite a few of the ladies have lichen sclerosis as well as VA.
JP x