Came across this article. The short version is to use diluted resin and acetone to pre-treat the surface before applying the mixed epoxy.
https://www.sciencedirect.com/science/article/abs/pii/S0142941819319853
West Systems epoxy is in the report. May work with others.
https://www.sciencedirect.com/science/article/abs/pii/S0142941819319853
West Systems epoxy is in the report. May work with others.