I used some Duplicolor spray bedliner on parts of my undercarrage and I think a can cost like 7 bucks. The better way is also more mone go get it lineX'ed.
And the Duplicolor works pretty well? I'm in Arizona so not alot of rust concern...but would like to protect it, so if the Duplicolor works I will go with the least expensive lol...
If you don't have a threat why take action? Do you put sunscreen on at sundown?
There are many products POR is popular. Some lightly spray the underneath with oil. Do a bit more searching.
I wouldn't rush out to do something not necessary.
And the Duplicolor works pretty well? I'm in Arizona so not alot of rust concern...but would like to protect it, so if the Duplicolor works I will go with the least expensive lol...