I’d be cautious about using nail polish and similar products. The solvents in them are likely to strip more oil from the nail and nail bed, which will make the problem worse, not better. +1 for asking a beautician for advice, but if you just pick a random one rather than one you personally trust, the risk is that they will give you a profit-maximising answer rather than a cheap-but-effective one.
I’d be cautious about using nail polish and similar products. The solvents in them are likely to strip more oil from the nail and nail bed, which will make the problem worse, not better. +1 for asking a beautician for advice, but if you just pick a random one rather than one you personally trust, the risk is that they will give you a profit-maximising answer rather than a cheap-but-effective one.