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bubbling paint/rust repair #5078129
04/17/19 07:32 PM
04/17/19 07:32 PM
Joined: May 2004
Posts: 1,372
Germantown, MD
greenjp Offline OP
greenjp  Offline OP

Joined: May 2004
Posts: 1,372
Germantown, MD
Looking for some advice on how to address the issue seen in these photos of my 2006 Accord. [Linked Image]
[Linked Image]
I am not terribly concerned about getting a "factory" or even close appearance, I just want to get rid of the bubbling paint and rust and use whatever combination/sequence of products necessary to prevent it from getting worse. I assume it'll start with chipping away the bubbles, then a sanding process of some sort, a rust converter or specialized primer, spray on touch up paint, and maybe a spray on clear coat? Any step by step advice or links to good how to's would be appreciated.

jeff

Re: bubbling paint/rust repair [Re: greenjp] #5078138
04/17/19 07:41 PM
04/17/19 07:41 PM
Joined: Dec 2013
Posts: 455
Kuala Lumpur ,Malaysia
alcyon Offline
alcyon  Offline

Joined: Dec 2013
Posts: 455
Kuala Lumpur ,Malaysia
Sand away the rust until you see bare metal or almost bare metal. Then wipe it down with a wet cloth to get all the loose particles off. Then wipe dry. Use Hammerite Kurust, apply with a brush . Let the Kurust cure, it will turn dark blue.
Once cured, you can spray your primer,or paint straight away. Dont forget to oil the inside part of the hood especially right under the rust if its possible.


Kyosho Optima Mid SWB, LWB and Lazer ZX
1991 Proton Saga 1.3S SOLD
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1992 Robinson Pro
Re: bubbling paint/rust repair [Re: greenjp] #5078149
04/17/19 07:54 PM
04/17/19 07:54 PM
Joined: May 2010
Posts: 10,264
out there
spasm3 Online content
spasm3  Online Content

Joined: May 2010
Posts: 10,264
out there
Be prepared that the repair area could end up at least twice as large as what you see, and as you sand it, it could end up being a rust through hole.


13 elantra 78k 5w30 synpwr
03 chevy avalanche 83k synpwr 5w30
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Re: bubbling paint/rust repair [Re: greenjp] #5078177
04/17/19 08:17 PM
04/17/19 08:17 PM
Joined: Jun 2002
Posts: 13,142
The Motor City
Kestas Offline
Global Moderator
Kestas  Offline
Global Moderator

Joined: Jun 2002
Posts: 13,142
The Motor City
A sandblaster does a superior job of prepping the surface. It's a tool I bought when I started restoring cars.

Whatever you do, the rust will be back after 2-3 years unless the car is retired from salt duty.

Re: bubbling paint/rust repair [Re: greenjp] #5078185
04/17/19 08:23 PM
04/17/19 08:23 PM
Joined: Jun 2003
Posts: 34,685
ME
eljefino Offline
eljefino  Offline

Joined: Jun 2003
Posts: 34,685
ME
You're going to have a dickens of a time blending the paint on that very visible curve. Any new paint is going to get blasted by the slipstream-- it should be at least as durable as stock.

What's a perfect hood, $50 at the junkyard?

It may be worth doing nothing, so it won't look stupid to have done something $10 and then to have had it come out poorly.

Maybe you could fix it with a NAPA color matched spray-bomb then cover the mess with that 3M clear film. It'll disguise the color gradients and protect what's left.

Re: bubbling paint/rust repair [Re: greenjp] #5078206
04/17/19 08:42 PM
04/17/19 08:42 PM
Joined: Feb 2009
Posts: 17,568
Michigan
daves87rs Offline
daves87rs  Offline

Joined: Feb 2009
Posts: 17,568
Michigan
Well, if it’s starting to rust there, I can imagine what the inside of the rest of that Accord is like. Wife’s Cavalier has rust like that on the hood....and no matter how hard I tried to save it- it will hit the junkyard soon.....


2019 Chevrolet Equinox LS
2006 Chevrolet Cobalt LS
Re: bubbling paint/rust repair [Re: greenjp] #5078221
04/17/19 08:55 PM
04/17/19 08:55 PM
Joined: Dec 2014
Posts: 493
Minnesota
2010Civic Offline
2010Civic  Offline

Joined: Dec 2014
Posts: 493
Minnesota
See if you can find a used hood in the same color. Much easier than trying to fix that. Check out car-part.com


2010 Honda Civic LX
Valvoline SynPower 5w-20 - Napa Gold oil filter
59,992 miles
Re: bubbling paint/rust repair [Re: greenjp] #5078223
04/17/19 08:56 PM
04/17/19 08:56 PM
Joined: Nov 2011
Posts: 5,198
MTL, CANADA
Rolla07 Online content
Rolla07  Online Content

Joined: Nov 2011
Posts: 5,198
MTL, CANADA
Sand down to metal, isopropyl wipe let dry, prime, and touch up paint with 2 coats. Wax a month or two later. Thats what id do..and maybe a clear coat.

Last edited by Rolla07; 04/17/19 08:56 PM.

2007 Corolla Red Pearl 155k miles
PP 0w20 & ST 4967
2015 Toyota Venza Parisian Blue Pearl 25k miles
TGMO 0W20 & OEM filter

Re: bubbling paint/rust repair [Re: eljefino] #5078259
04/17/19 09:30 PM
04/17/19 09:30 PM
Joined: Dec 2002
Posts: 42,973
New Jersey
JHZR2 Offline
Global Moderator
JHZR2  Offline
Global Moderator

Joined: Dec 2002
Posts: 42,973
New Jersey
Originally Posted by eljefino
You're going to have a dickens of a time blending the paint on that very visible curve. Any new paint is going to get blasted by the slipstream-- it should be at least as durable as stock.

What's a perfect hood, $50 at the junkyard?

It may be worth doing nothing, so it won't look stupid to have done something $10 and then to have had it come out poorly.

Maybe you could fix it with a NAPA color matched spray-bomb then cover the mess with that 3M clear film. It'll disguise the color gradients and protect what's left.



I was going to say similar. Used hood.

Im not sure a repair will last. I suppose it could if done right, ground down to bare metal, etc.

If I had to repair it, Id grind it down, chemically convert the surface, and then take to maaco to color match...

Re: bubbling paint/rust repair [Re: greenjp] #5078350
04/17/19 11:29 PM
04/17/19 11:29 PM
Joined: Mar 2013
Posts: 1,053
NY
joegreen Offline
joegreen  Offline

Joined: Mar 2013
Posts: 1,053
NY
I almost guarantee you have a hole there once you pick away at it. If you want the rust gone you have to get it back to good steel.


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: bubbling paint/rust repair [Re: greenjp] #5078444
04/18/19 05:54 AM
04/18/19 05:54 AM
Joined: Sep 2017
Posts: 539
One Step Beyond
MasterSolenoid Offline
MasterSolenoid  Offline

Joined: Sep 2017
Posts: 539
One Step Beyond
The rust most likely started under the hood where the seam is.

I would:
1) Scrap away the rust and see what you have
2) Open the hood and remove any rust
3) If you have a 'hole', rivet a patch on or use Body Filler.

This is why people Oil Undercoat their vehicles.
I suggest you buy an 'aerasol' can of Fluid Film and spray ALL the (inside) seams of Hood, Trunk and Doors
Doing so will prevent any future rust in those areas.

Spraying under vehicle
https://www.youtube.com/watch?v=L2bqMK2qT9Y

Atomizer Hose for 'inside' Doors and Hoods
https://www.youtube.com/watch?v=VmlM-jH5XBs


2002 Ford Ranger
2 Wheel Drive
3.0 Liter Engine
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Re: bubbling paint/rust repair [Re: greenjp] #5078447
04/18/19 05:56 AM
04/18/19 05:56 AM
Joined: Nov 2006
Posts: 22,047
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 22,047
MA, Mittelfranken.de
There is a quite possibly a hole lurking under that. The right way with welding a patch and all the rest of it is time consuming and costly but there is a hack way that works surprisingly well and will hold for quite a while.

Mask the area off and grind it down then probe it with a screwdriver to see if it goes through, if it goes through grind it so rust is showing and wire wheel the back if possible.
Fill the hole with JB weld stick epoxy flattening it out behind and on top. Sand it smooth, touch up with bondo then use a self etching primer and then a regular primer filler and wet sand it smooth.
Paint the repair.

Do not use bondo fill the hole instead of JB weld, bondo is made with talc and absorbs water from behind causing moisture to get under the paint and bubble.
If you need more info or help PM me.

Edit: Make sure the drain holes on the inside of the hood at the front/sides are open.




Last edited by Trav; 04/18/19 05:58 AM.

ASE L1, Master. Deutsch Meisterbrief.
Re: bubbling paint/rust repair [Re: greenjp] #5078454
04/18/19 06:09 AM
04/18/19 06:09 AM
Joined: Sep 2013
Posts: 11,110
Indiana
dlundblad Offline
dlundblad  Offline

Joined: Sep 2013
Posts: 11,110
Indiana
I'd be concerned with rust being under the folded seam on the bottom of the hood too.


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Re: bubbling paint/rust repair [Re: greenjp] #5078466
04/18/19 06:25 AM
04/18/19 06:25 AM
Joined: Mar 2004
Posts: 22,494
Upstate NY
Donald Online content
Donald  Online Content

Joined: Mar 2004
Posts: 22,494
Upstate NY
Its going to be a bigger deal and more work than you are thinking.

You could scrape away the major rust with a screwdriver and use one of the rust treatment products. They chemically change the rust. It will be better but by no means perfect. But its a 14 yr old vehicle. What the undercarriage look like? (rust wise)..


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: bubbling paint/rust repair [Re: Trav] #5078518
04/18/19 07:45 AM
04/18/19 07:45 AM
Joined: Jun 2002
Posts: 6,912
MI
doitmyself Offline
doitmyself  Offline

Joined: Jun 2002
Posts: 6,912
MI
Originally Posted by Trav
Do not use bondo fill the hole instead of JB weld, bondo is made with talc and absorbs water from behind causing moisture to get under the paint and bubble.
If you need more info or help PM me.

I learned about the Bondo absorbing water the hard way when I was a teenager (dinosaurs roamed the earth).

Even though the internet gurus frown on it for "proper" repairs, I have found that a fiberglass repair kit works very well when there is a hole on the backside. It is used for boats and is 100% water proof and the combo of fabric and resin gives it some strength.

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