Welcome drame. In my case, most of the electrical and electronic components that are non replaceable are incapacitated, so I haven't had any problems with the amount of over spray of rust inhibitors that I have used over the years, and I'm talking about 40 of them. I have used electronic and electric cleaning and dressing sprays, mostly on my Impulse guns and repair/maintenance work on my tools ( all brands of them ). When it comes to maintaining the inner workings of my tools, I use a brush and either a vac or compressed air to remove solid ( drywall dust, wood dust and the like) and liquid ( rain, urine and mud ) and if there is any grease that is in need of replacing I doe so with the recommended product. Hope it helps answer your questions.
I also have found a way to help with the rust problems, I moved an hour inland, seems to work great on the tools. Still get a bit of the rain, but less of the salt, of course with a tropical storm coming in this weekend we will see.