Chip repair

[BlueOvalFitter]

This past weekend I detailed my truck. I found a chip on the roof about the size of a dime,rusted. I sanded it and used Duplicolor paint to prevent further damage until I get it fixed correctly. Is this a repair I can do or let a professional do it? What is involved if I do the repair?

 

[JHZR2]

its not a repair. It will continue to rust underneath.

You need to sand to clean metal, convert or neutralize the rust, reprime the clean metal, then paint over that with some basic light sanding over the overlapping paint areas to ensure good bonding.

 

[chubbs1]

in other words, you should probably take it in to someone.

 

[BlueOvalFitter]

Originally Posted By: JHZR2
its not a repair. It will continue to rust underneath.

You need to sand to clean metal, convert or neutralize the rust, reprime the clean metal, then paint over that with some basic light sanding over the overlapping paint areas to ensure good bonding.

You're saying I need to use something like NAVAL JELLY,or a primer that converts rust to metal?

 

[JHZR2]

Originally Posted By: BlueOvalFitter
Originally Posted By: JHZR2
its not a repair. It will continue to rust underneath.

You need to sand to clean metal, convert or neutralize the rust, reprime the clean metal, then paint over that with some basic light sanding over the overlapping paint areas to ensure good bonding.

You're saying I need to use something like NAVAL JELLY,or a primer that converts rust to metal?


Yes. At minimum something like Eastwood rust converter and then rust encapsulator, or if you would be more aggressive, sanding and naval jelly to the point where you see fresh metal, then self-etch high Zn primer and then a full panel blend/respray.

If holes exist, then cutting to good metal, welding in new metal, with rustproofing applied to both sides, and then repaint is the only way to go.

 

[GMBoy]

Once you properly prep the surface like JHZR2 was saying, do what I do...put the touch up paint on as best as you can and let dry. Then put another thick coat on - sloppy is fine. Let it dry atleast a day. Now, get some very fine 2000-2500 grit sandpaper. Wet sand the chip lightly to remove the excess paint and blend the area. Than use polishing compound to remove the dull finish you will have from sanding, then wax... The chip or scratch will be UNDETECTABLE!

I've done this so many times - it works great. Be sure to use lots of water (soak the paper) and light sanding. Stop frequently to see how you're doing - when you cannot see where the chip is than you have blended the chip to surrounding paint. Now polish out the dullness and your're done.

 

[BlueOvalFitter]

Originally Posted By: GMBoy
Once you properly prep the surface like JHZR2 was saying, do what I do...put the touch up paint on as best as you can and let dry. Then put another thick coat on - sloppy is fine. Let it dry atleast a day. Now, get some very fine 2000-2500 grit sandpaper. Wet sand the chip lightly to remove the excess paint and blend the area. Than use polishing compound to remove the dull finish you will have from sanding, then wax... The chip or scratch will be UNDETECTABLE!

I've done this so many times - it works great. Be sure to use lots of water (soak the paper) and light sanding. Stop frequently to see how you're doing - when you cannot see where the chip is than you have blended the chip to surrounding paint. Now polish out the dullness and your're done.

I want to add a couple of coats of clearcoat;should I use the same procedure as you describe above?

 

[GMBoy]

Originally Posted By: BlueOvalFitter
Originally Posted By: GMBoy
Once you properly prep the surface like JHZR2 was saying, do what I do...put the touch up paint on as best as you can and let dry. Then put another thick coat on - sloppy is fine. Let it dry atleast a day. Now, get some very fine 2000-2500 grit sandpaper. Wet sand the chip lightly to remove the excess paint and blend the area. Than use polishing compound to remove the dull finish you will have from sanding, then wax... The chip or scratch will be UNDETECTABLE!

I've done this so many times - it works great. Be sure to use lots of water (soak the paper) and light sanding. Stop frequently to see how you're doing - when you cannot see where the chip is than you have blended the chip to surrounding paint. Now polish out the dullness and your're done.

I want to add a couple of coats of clearcoat;should I use the same procedure as you describe above?


I have never used clear coat in my repair because they looked perfect as they were - but if you do use clear coat - and that probably is a good thing to do - then yes, it would be the same procedure.

The wetsand procedure is very much like you would sand out a fine scratch, you are "leveling" the paint with the surrounding area.