Originally Posted by 1of40
How much can really be expected of a product that is applied to an uncleaned surface?
I know it sounds weird, but because it's an oily, non-drying substance, it really can go right on over pretty much everything, including old undercoating. I did pressure wash the underside, but that's about it. I did the coating about a month ago, and it's clearly reached the steel, working its way through the POs rubber undercoating (or maybe factory, I dunno), and obviously changing the rust it hit into, well, totally stabilized rust (like the browned finish that was used on many muzzleloaders).
CDN38, you're right--I didn't watch the video first, and, yes, I also was looking at Tapatalk when I should've been going to bed, which is only slightly smarter than using your phone to post a hurried reply to a thread when you should be going to bed. But I did see the kit photo with a range of products and thought, "Holy cow, it's a 37 step process," which, having viewed the video, turns out to be only a slight exaggeration.
I'd frankly rather do a 2 hour process annually than a 10 hour (which may be conservative) process once, especially since I (being the sloppy and impatient sort, which many of you may not be) would probably do a crappy job and leave portions of the chassis unprotected for years. With fluid film, there's a good chance that one year's crappy job will hit the spots I missed or under-treated the previous year. The kit I got comes with a 360-degree wand that can be fitted to an aerosol can for getting inside the frame and b/c pillars, as well as a spray gun and a gallon of fluid film, only half of which I used this year.
I used POR15 on a SIIA 109 I had years ago, and, like someone else in this thread, wasn't impressed. I ended up putting a galvanized chassis on the truck a few years later. I am kind of a fan of a rust-treatment, vice rust-solution, approach. What could be more fun than spraying sheep grease (fluid film is non-hazmat, and lanolin-based) on your truck every year, anyway?
That said, the product looks pretty amazing, and if one has the patience to properly strip and prepare and vaseline one's forehead, it could be a superb way to go.
Last note, my truck has spent its entire life until January in Texas, so it is pretty much rust-free, which is one reason it didn't need prep beyond a good washing. I do believe that if a truck is already rusty, one should knock off the chunks before fluid-filming it.
All that to say I think Fluidfilm is a neat option, and wanted to throw it out there since I hadn't seen it mentioned.