Why is it necessary to strengthen the sides of the nail before sheathing?
When the square is not symmetrical: in this case, it is necessary to construct the parallels of the square so that it is well proportioned.
When your client has had a detachment on the tip of the nail: the base material will hold less well because a layer has already come off. It is necessary to reinforce it with a hard material such as acrygel or a gel .
When the nails are fragile: the rubber base will not be sufficient because the nail will bend under the base .