That might work well for those with older nodes and probably work better than the thinned plasti-dip method that never seems to fully dry. I would think that it would work well on all of the controllers except fot the Express. The reasn I would be carefull using it on the Express is that it it could make repairs difficult if you blow out a triac or need to replace any other components on the board. I would be cautious about using it on Pixelnet hubs that have soldered in fuses until some experimenting is done on soldering is done on boards treated with this stuff. If it proves easy to remove for soldering, then it should be good for just about everything. Unlike rain-X, thisn appears to be a permanent coating so I would avoid spraying it into connectors as well.