Montage has been used by a number of projects to create image mosaics for distribution as science products. One such project is the the Spitzer Deep, Wide-Field Survey (SDWFS), which you can read about in the paper by Ashby et al. It is a four-epoch infrared survey of ten square degrees in the Bootes field of the NOAO Deep Wide-Field Survey made with the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope. Its science value lies in the face that the four epochs allow selection of infrared-variable and high proper motion objects over a wide field on timescales of years,and it is senstive out to z~3 with relatively little impact from cosmic variance.
The project used Montage co-add individual tiles into full-field images, one for
each band and each epoch. The authors note that they used the coverage maps that accompany the mosaics to eliminate the impact of cosmic rays on the final mosaics. The mosaics are available as science products from the NASA/IPAC Infrared Science Archive (IRSA).