Most radio manufactures will void your warranty if you return a receiver that has anything like oil or corrosion X on it ,stay away from Corrosion X for this application. This is taken from the manufactures web site "Corrosion X is also a super lubricant and penetrant. It lubricates under heavy loads and high temperatures. Use it on sheaves, hinges, locks, cables/wire ropes, windlasses or other rotating devices. It is ideal for fishing reels and guns. And, CorrosionX penetrates like nothing you've ever used. Corroded or rusted nuts, bolts or fittings can usually be removed within a few minutes." No where do they say to put it in electronic devices. The simple fact they promote it as a penatrant should tell you not to use it on such devices. Why would you want anything to penatrate a circuit board. I am sure that used for its intended purpose that Corrosion X works well but like anything else it can be abused by using for electronics.
Your best solution is to build a good radio box and if your receiver does happen to get wet get the power off of it, open the case and use some 90% or better Isopropyl alcohol to clean it and let air dry this will not void your warranty. If you must do something else I have found that Plasti Dip (spray on) can be used directly on the PC board and will not harm any of the components, it can be removed with some effort if you need to but this too will probably not go over well if you try to have any warranty work done. I don’t want to start a flaming session on the guys that use Corrosion X suffice to say I have been working on electronics for over 20 years and have not found any manufacturers that would suggest you put something like that on a circuit board. There are substances called conformal coatings that can be used directly on PC boards but Corrosion X is not one of them. I know there are some of you out there that have been lucky and that stuff has not hurt your receivers, but it’s like the story that goes something like this.
A guy is standing on the street corner snapping his fingers. A man comes up and ask what he is doing and the guy snapping his fingers says “I’m keeping the lions away” to this his inquisitor replies “there are no lions in the city” at this point the guy says “see it must be working then”. Please do not put any oil type products on electronic components.
