interesting how the the boxes stood up on the 2000 to 2007 classic and after that they started to rot just like the dodges 

cdnpont wrote:

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I know it's deeper than that, but could moisture have been trapped under that wrap job?

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 Actually theres quite a bit of body filler in there also. I think this work vehicle had rust repair before the wrap was done. A neighbour has a 2009 Chevy 1/2 ton and it still looks fairly good but the chassis rotted out just ahead of the rear spring hanger. Im not bashing Chevys, they all rust. 

Paul

You ain't seen rust until you move to PEI. We have the perfect storm: salt water all around us, salt air, and salt and gravel in the winter on the roads. The Chrysler dealer I worked for in Charlottetown stocked subframes for a few models.
People actually use "Ontario Car" as a selling feature in classifieds if they have a car from there (much like we used "Western Car" in Ontario as a selling feature if we had one).

Rust Check and Krown work if properly applided. My 2002 Tacoma had original paint and frame, Krowned since new. They missed the ends of the front and top of gas tank, both rusted through. These trucks has rusty frames from mid 90s to 2012, maybe newer. Same for all Toyota full truck frames, tundra, SUVs, including those badged as a Lexus.

All the newer trucks rust over the back tires like that.

Lt1 Burb wrote:

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I have never seen a rusty bed on that vintage truck out here.

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 Rare not to see that here, all makes. Front fenders too. 

DonSSDD wrote:

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Rust Check and Krown work if properly applided. My 2002 Tacoma had original paint and frame, Krowned since new. They missed the ends of the front and top of gas tank, both rusted through. These trucks has rusty frames from mid 90s to 2012, maybe newer. Same for all Toyota full truck frames, tundra, SUVs, including those badged as a Lexus.

All the newer trucks rust over the back tires like that.

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 Yup, I'm still year-round driving '97 and '07 vehicles that I've used Krown on.  I usually will buy a few cans of Rust Check from Canadian Tire to touch up the spots they miss.  Typically they don't do much around the brakes, so I tend to touch up the suspension arms, brake lines, wheel arch flanges, etc.  Also I go through the engine compartment and touch up all the little pipes that tend to rust out and leak and are a pain in the ass to replace.  Underneath, I look for any nooks and crannies that they might not give attention to - really that depends on the person applying it, how thorough they have been.

It's great stuff, but it is messy.

Lot's of rotten pickups in NS.  Surprises me a little, given how much they cost to buy, that their body construction is so simple, yet the manufacturers don't do much to prevent rust.  Like a cash grab for the companies - build them simply but charge a fortune.  Toyota had a frame rot problem that was due to a spec/check miscommunication between Dana and Toyota, I've heard through the gravevine.  I imagine that they've cured that now, given the millions (billions?) they've spent replacing frames and buying back trucks.

That said, I'm not in the business anymore, so I don't know how those newer F-150s with the aluminum/composite bodies are holding up.  The next big thing we'll probably be talking about is when these new electric trucks start catching fire due to corrosion in the battery packs and other circuitry...

I'm starting to think Krown and others are over rated. My truck has been RP since new. I bought it used and started with RP in 2020 in May after I bought it in December. Took the truck to florida for 2 months in 2020. RP since then with Krown.
I was changing an LED back up light I installed under the rear bumper last month and noticed how prevalent the rust was showing under the bed and spare tire area. The truck has sat in the heated garage ALL 2020 (C19 could not go to Fla) only 9K. In 2021, same deal, truck had about 10k. This year, just getting to 10K, went to Fla, then drove my beater all the rest of winter till now....
Took it back to Krown, they didn't even argue. They resprayed the rear and down the frame... "The rust proofing is working, it's there, it's just been absorbed into the metal"!!!!

Really..... I think I've spent my last dime on RP. Most of it ran on the floor and it has something in it that leaves a mark in the epoxy finish on my floor...

My .02 cents

RP works if applied correctly, cant miss any spots. I have to remind them to spray certain areas. I think they lightened the gauge of the metal in truck boxes too with that body style above. Most cars have gone to galvanized areas, that works, but not used on truck boxes.

Before I retired I was a mechanic for our City roads department. Our big trucks we sprayed in house with a product branded RP Oil. Our pickups and cars were tendered out on a yearly basis and it was usually one of the big two franchises that got the tender. We had sent a pickup truck out to be sprayed and when it came back the shop foreman gave me the job of an oil change. I put it on the hoist expecting a dripping mess and it was totally dry underneath.
The company sprayed everything that was visible or doable from the top but did nothing underneath. We wouldnt have known if it wasnt in for an oil change. Needless to say they never got the tender again.

Paul

LT1Caddy wrote:

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I'm starting to think Krown and others are over rated. My truck has been RP since new. I bought it used and started with RP in 2020 in May after I bought it in December. Took the truck to florida for 2 months in 2020. RP since then with Krown.
I was changing an LED back up light I installed under the rear bumper last month and noticed how prevalent the rust was showing under the bed and spare tire area. The truck has sat in the heated garage ALL 2020 (C19 could not go to Fla) only 9K. In 2021, same deal, truck had about 10k. This year, just getting to 10K, went to Fla, then drove my beater all the rest of winter till now....
Took it back to Krown, they didn't even argue. They resprayed the rear and down the frame... "The rust proofing is working, it's there, it's just been absorbed into the metal"!!!!

Really..... I think I've spent my last dime on RP. Most of it ran on the floor and it has something in it that leaves a mark in the epoxy finish on my floor...

My .02 cents

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Is RP a brand name?

I can only speak to my experience, and Krown has worked on my cars.  I've had them up on the hoist and there's no rust to speak of on the '97 or '07.  In fact the last time I had them safety inspected the guy at the shop assumed that the '97 was winter stored (inspected Aug '21) and the mechanic who looked at the '07 couldn't believe that there was no rust on it (inspected Jan '22).

It sounds like maybe they missed a large section of the rear of your truck?  With social media being what it is, I'm sure they didn't want any bad tweets or whatever complaining about their shop or the product.  It was probably like "oh crap, how did we do such a lousy job - get him in here!"... I dunno.

FWIW, on my cars the stuff drips for a month or so, but even then if you clean it off exterior surfaces because you don't want it getting all over your clothes, it will creep back there again within weeks.

Regardless, I say do whatever works for you.  I don't have a horse in the race, just trying to give the benefit of what worked for me.  YMMV.

The oil that I used at work was labelled rp oil. I cant remember the manufacturer but the rp was short for rust preventative. It was a pale yellowish colour and had the consistency of a light grease. It worked well on our plow trucks.

Paul