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Rust prevention for troughs |
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First_Gear
AMC Addicted Joined: Jan/18/2010 Location: Mukilteo WA Status: Offline Points: 644 |
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I did this on mine. They were in good shape still galvanized! I had the fenders off and had to remove them to get to the cowl. (Inside of my cowl was swiss cheese) I lightly sand blasted them, welded them back on and applied spi epoxy followed by restoration shop 2k urethane (under hood black) recaulked with brushable seam sealer and replaced the rubber seals. I don't expect problems for the rest of my lifetime.
Here in rainy washington you gotta make your cars water proof or be willing to let the car sit for 10 months out of the year.
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Joelfanti
AMC Apprentice Joined: Jan/17/2021 Location: Ohio Status: Offline Points: 70 |
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Look up SEM rust trap. Urethane coating that I’ve used all over my Javelin. It amazing stuff. If you want pictures you can message me. I’m not up to 30’posts yet so I can post yet
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george w
Supporter of TheAMCForum Joined: Jan/27/2013 Location: New Jersey Status: Offline Points: 2899 |
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Don't forget to paint/treat the underside of the front fenders above the troughs.
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Long time AMC fan. Ambassador 343, AMX 390, Hornet 360, Spirit 304 and Javelin 390. All but javelin bought new.
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sweatlock
AMC Addicted Joined: Apr/28/2014 Location: Largo, FL Status: Offline Points: 3313 |
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I’m surprised at the bad feedback regarding POR-15, I’ve been using it for years with no issues. I’ve always thought it was a good product and did what it was advertised to do. Florida is pretty tough on old vehicles, too.
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TX390AMX
AMC Addicted Joined: Dec/27/2012 Location: Indiana Status: Offline Points: 803 |
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Back in the early 80's, long before POR15 and other corrosion prevention products, my brother-in-law and I used a mixture of STP (remember that?) and mobile home roof coating inside the fenders and troughs of my then-wife's 72 Javelin SST. Also put it inside doors, trunk drop-off areas and anywhere else midwest rust was likely to attack. My daughter still owns the car today, the body looks great, even tho it's been driven in salt/chloride winters in Illinois til about 10 years ago when she moved to Texas. Unfortunately, the floors, trunk, frame rails and other areas we didn't treat or couldn't easily get to are toast, but the fenders and doors still look great.
If it's going to be maintained with any sort of concern for the elements, any etching epoxy primer and top coat will do. Even brushable Rustoleam would be a good choice for the trough areas. Remember, these areas were either dipped in primer or missed entirely when the cars were new and they weren't expected to last 50 years! A side effect of the STP/roof coating mix was that the car would "leak" from the doors and bottoms of the fenders during hot summer days. Paint it with something and let your heirs worry about it for the next 50 years. |
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Terry
68 AMX 390 4 Sp Rally Green 68 AMX 390 4 Sp Matador Red 68 AMX 390 4 Sp Calcutta Russet 56 Chevy Sedan Delivery 2016 Can AM Spyder 55 Chev pickup |
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6881 |
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After sand blasting/painting or POR15 I always use this in the troughs and on the inner fenders:
Have never seen flaking, drying, rust after applying this. Brutal to get it off hands or clothing - just be warned!
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ccowx
AMC Addicted Joined: Nov/03/2010 Location: Yukon Status: Offline Points: 3510 |
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I would like to second the comment about cleaning and protecting the under side of the fenders. My 1970 had the tops of both fenders soft and rusting through when I got it. Funnily enough, the troughs underneath are fine, to this day. The water and sand and all that collected but the corrosion did not seem to harm the troughs themselves. Worst thing that happened to them was that the staples holding the rubber seals on rusted away!
Chris
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Joelfanti
AMC Apprentice Joined: Jan/17/2021 Location: Ohio Status: Offline Points: 70 |
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I raptor liner me inner fenders after painting them
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