Factory Wax Coating Coming Off Frame

[4.3chevyrob]

I just bought a 2007 NBS Silverado RCLB with 31K on it. I was under it the other day trying to get the trailer hitch off and I noticed that the wax coating is coming off the frame on the underside of all of the frame rails and on every sharp edge/corner. Where it has come off there is some fairly severe corrosion(not rusted through, but flaking off, see photosf). What are my options? This seems ridiculous for a truck with only 30k on it. Can I just hit the spots that are rusted with POR-15, do I have to strip the whole frame? Anyone have any experience with this.

[dirtfan21]

I use 3M rubberized undercoating. Just use a steel brush to get rust/crap off then hit it with the spray can. I live in the salted roads neck of the woods so this has ALWAYS been common for me. End up doing it in spring and right before winter hits. Works pretty darn well for me anyway.

 

Don't feel too bad. I bought mine with 29,9xx and was 3 times as bad as what you are showing.

[4.3chevyrob]

I use 3M rubberized undercoating. Just use a steel brush to get rust/crap off then hit it with the spray can. I live in the salted roads neck of the woods so this has ALWAYS been common for me. End up doing it in spring and right before winter hits. Works pretty darn well for me anyway.

 

Don't feel too bad. I bought mine with 29,9xx and was 3 times as bad as what you are showing.

 

Thanks, I think I am going to clean it, hit the exposed areas with POR-15 and then use the 3m Undercoating. Thanks again,

[Eddie 70]

Good idea. I just cleaned the underside of mine where there was some oil leakage. While under there I cleaned up some clay that was on certain places. That may not have been such a good thing because I think I may have removed some of the factory coating too. I will be picking up some 3M Rubberized coating this weekend and cover that stuff back up good.