A mounting system includes an upper collar, a first lower collar that is configured to magnetically couple a rimmed finishing section to a luminaire, and a second lower collar that is configured to magnetically couple a rimless finishing section to the recessed luminaire. The first lower collar is removably coupled to the upper collar when the rimmed finishing section is to be coupled to the recessed luminaire, and the second lower collar is removably coupled to the upper collar when the rimless finishing section is to be coupled to the recessed luminaire.