Unfortunately, it takes an expert to determine that definitively. An engineer employed by the manufacturer would be a good source for your answer. In the absence of that expert, we recommend a conservative approach. A very minor dent or scratch is worth noting as an indicator of how lift equipment is operating around the system, but it normally is not cause for action with respect to repair. A conservative approach says that more major damage, especially to a column, should be addressed through repair or replacement.
Many users prefer to repair their own components, and sometimes that is the best solution.
From the user's standpoint, it more often is not the preferred action, for several reasons. The first is that if subsequent failure occurs, the user has increased vulnerability from a liability standpoint. In addition, if the risk of an improper repair is factored into the equation along with the cost of repair, it often makes more economic sense to replace the component. These factors must be considered before repair is undertaken. If the TSP procedure is followed, however, this decision will be infrequent at best.