Rocker panel / bottom of door coatings...?

[Godsmackedme]

So after watching these forums for a while I've decided to finally start building up my truck a little. I've ordered 35" nitto terra grappler a/ts and a 3 inch body lift. But I've got a problem with rust underneath the driver side and passenger side doors...its starting to round the corner and crawl up the door now. My truck is black. I've sanded all my problem spots down, sprayed on a primer and then rustoleum black. Ive decided that I dont like the way it came out...noone else would really ever notice but I do and its annoying. Ive seen other vehicles with a strip along the bottom of their doors..some make this strip with a roll on bedliner. I think it would come out ok if i did a 8 inch strip along the bottom of the truck. Now my question is what to use? herculiner, another type of roll on bed liner, or somthing like undercoating? The roll on bedliners seem to come out good but many complain about chipping like a year later. Has anyone had any experiance with this situation? I'm looking for somthing affordable so lining it with rhino lining or somthing like that is kinda outta the question.

[Bindernut]

Herculiner will work fine. I know a couple guys that have used the Dupli-Color brand roll on stuff too, but they've only been done a few months so I'm not sure how well that brand holds up. I used herculiner for chipguard on my Nissan and it's holding up pretty good after a couple years...this is with daily driving on gravel roads with A/Ts chucking gravel stones constantly.

The trick to getting it to stick and not peel or chip is in the surface prep before you apply it. make sure you do a good job of dewaxing/desiliconing the paint using an acetone type cleaner (careful with this stuff it's nasty!). Next, scuff the area you're coating with fine sandpaper so the coating has something to grab too. Apply as per the can's instructions.

You might want to check with a local Rhinoliner place anyway. There's a lot less surface area than if they're doing a whole bed interior so a chip guard application should be cheaper than getting a bed done. I'd guess you could probably get it done for $150-200...compared to $70 for the DIY stuff and the labor you stick in. Might be worth looking into anyway.