Heater box rust - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Gary 70 Jimmy** · 12-21-2023, 03:21 PM

What is the best paint to put on heater box blower motor was going to use POR-15 or a diferant paint that will go over rust was wearied obout the smell and fumes.

**Getter-Done** · 12-21-2023, 03:35 PM

I would use Evapo-rust then you can paint it with the paint of your choice.

Link: https://www.amazon.com/Evapo-Rust-Or.../dp/B00M0TLQ66

I really like this evapo-rust , It is reusable if you can contain it.

Perfect for small parts.

With the bigger parts you lay a rag or towel over it and keep it damp.

Some of the gears I clean with it sat out for several weeks with no signs of flash rust.

**Gary 70 Jimmy** · 12-21-2023, 04:14 PM

Trouble submerging it has the plastic for out side cover might change the color of the plastic.

LS short box · 12-21-2023, 05:35 PM

I would spot sand blast it as needed and then as said above a good spray bomb paint will be fine.

**1970cstblazer** · 12-21-2023, 11:57 PM

Sandblast that part. Then use a quality self etching primer, then paint semi-gloss black.

**HO455** · 12-22-2023, 01:47 AM

You can remove that piece from the fiberglass box if you drill the pop rivets out. The one in my Burban were rusted worse than yours so I removed it, sandblasted it followed by treating with Ospho. After I was sure the Ospho was neutralized I primed with self etching primer and painted.

Here's a link to what I did. Starting at post 1010.

http://67-72chevytrucks.com/vboard/s...698377&page=41

franken · 12-22-2023, 05:12 AM

The only real solution regardless of the question is blast the rust away.

**Rust_never_sleeps** · 12-22-2023, 03:39 PM

pretty sure none of those paints will outgas after it's flashed off and cured, but I suppose you could warm it to ~125F and bake it a little for extra cure, then give her a sniff

**71CHEVYSHORTBED402** · 12-22-2023, 06:58 PM

Mine had some rust. Not enough to disassemble it. I removed it, and painted much of its interior with master series primer and paint. The exterior sheet metal primed and painted. You may need a new flapper door, the hinges are prone to rust.

12-21-2023, 03:21 PM	#1
Gary 70 Jimmy Senior Member Join Date: Jan 2002 Location: Burghill, Ohio 44404 Posts: 3,401	Heater box rust What is the best paint to put on heater box blower motor was going to use POR-15 or a diferant paint that will go over rust was wearied obout the smell and fumes. Attached Images __________________ 1972 GMC Jimmy 1/2 4X4 4wheel camper 1970 GMC Jimmy 1/2 4X4 350 1969 Chevy Blazer 1/2 4X4 307 1967 chevy LWB 3/4 396

12-21-2023, 03:35 PM	#2
Getter-Done Senior Member Join Date: Dec 2009 Location: TN. Posts: 7,872	Re: Heater box rust I would use Evapo-rust then you can paint it with the paint of your choice. Link: https://www.amazon.com/Evapo-Rust-Or.../dp/B00M0TLQ66 I really like this evapo-rust , It is reusable if you can contain it. Perfect for small parts. With the bigger parts you lay a rag or towel over it and keep it damp. Some of the gears I clean with it sat out for several weeks with no signs of flash rust. __________________ ________________________________________________________________________________________ ____________________________________________ 84 Chevy K-20 63 Impala (my high school car) http://67-72chevytrucks.com/vboard/s...Crew Cab Build

12-21-2023, 04:14 PM	#3
Gary 70 Jimmy Senior Member Join Date: Jan 2002 Location: Burghill, Ohio 44404 Posts: 3,401	Re: Heater box rust Trouble submerging it has the plastic for out side cover might change the color of the plastic. __________________ 1972 GMC Jimmy 1/2 4X4 4wheel camper 1970 GMC Jimmy 1/2 4X4 350 1969 Chevy Blazer 1/2 4X4 307 1967 chevy LWB 3/4 396

12-21-2023, 05:35 PM	#4
LS short box Registered User Join Date: Jun 2015 Location: Carlos MN Posts: 1,979	Re: Heater box rust I would spot sand blast it as needed and then as said above a good spray bomb paint will be fine.

12-21-2023, 11:57 PM	#5
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,392	Re: Heater box rust Sandblast that part. Then use a quality self etching primer, then paint semi-gloss black. __________________ 1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels

12-22-2023, 01:47 AM	#6
HO455 Post Whore Join Date: Feb 2016 Location: Portland Oregon Posts: 10,944	Re: Heater box rust You can remove that piece from the fiberglass box if you drill the pop rivets out. The one in my Burban were rusted worse than yours so I removed it, sandblasted it followed by treating with Ospho. After I was sure the Ospho was neutralized I primed with self etching primer and painted. Here's a link to what I did. Starting at post 1010. http://67-72chevytrucks.com/vboard/s...698377&page=41 __________________ Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377

12-22-2023, 05:12 AM	#7
franken Registered User Join Date: Jun 2013 Location: Somewhere Posts: 3,066	Re: Heater box rust The only real solution regardless of the question is blast the rust away.

12-22-2023, 03:39 PM	#8
Rust_never_sleeps Senior Member Join Date: Jun 2022 Location: San Ramon,CA Posts: 452	Re: Heater box rust pretty sure none of those paints will outgas after it's flashed off and cured, but I suppose you could warm it to ~125F and bake it a little for extra cure, then give her a sniff __________________ 1970 C10 Custom longbed 350/350

12-22-2023, 06:58 PM	#9
71CHEVYSHORTBED402 Senior Member Join Date: Feb 2009 Location: Northern Nevada Posts: 7,187	Re: Heater box rust Mine had some rust. Not enough to disassemble it. I removed it, and painted much of its interior with master series primer and paint. The exterior sheet metal primed and painted. You may need a new flapper door, the hinges are prone to rust. __________________ Tony 71 Custom Deluxe, SWB, 2WD, 402, A/C. I developed an assembly kit for restoring the (a) truck from the ground up. My build thread, and more on the assembly kit https://67-72chevytrucks.com/vboard/...d.php?t=730025



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