what is this?!!
#6
The plastic plug covers access holes to the frame. You pop those out when you want to spray undercoating inside the frame rails. Not a bad idea if you live in a salt area or like to go mudding.
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#12
That foam won't seal water perfectly. Therefore water WILL get in there and SIT on the metal with no chance of drying basically and will speed up the rusting process.
I've seen people use that crap on boats(worked in a boatyard) and we pull out the foam after the boats been sitting in the yard shrink wrapped for like a summer or w/e and there will be all kinds of mildew and water crap behind it.
I know its not exactly environmentally but you could squirt a little oil in there or wd40 and then PUT THE PLUG BACK IN!!
I've seen people use that crap on boats(worked in a boatyard) and we pull out the foam after the boats been sitting in the yard shrink wrapped for like a summer or w/e and there will be all kinds of mildew and water crap behind it.
I know its not exactly environmentally but you could squirt a little oil in there or wd40 and then PUT THE PLUG BACK IN!!




