Help : What the heck happened here?

[Vegas Transplant]

And thank you for coming full circle with this thread.
Happy detailing...

[604_Snooze]

Did you sand off the old clearcoat and respray new clearcoat?

[garyg7133]

Originally Posted by 604_Snooze

Did you sand off the old clearcoat and respray new clearcoat?

I wet sanded it with 2000 grit until the film was gone.Honestly this is the first time I've clear coated anything other than a table or a goalie mask so I was REALLY nervous about removing any of the base coat. I then evened it out by wet sanding the rest of the hood so that there was no evidence of the spotting that was taking place. As you can see in the original picture on this post, the major failure was from the front of the hood to the middle. It had held together on the rest of the hood but I figured if I got rid of what was failing and a little more I'd have a better chance of NOT having the paint fail again after I did it.

[garyg7133]

Originally Posted by 604_Snooze

Did you sand off the old clearcoat and respray new clearcoat?

Originally Posted by Vegas Transplant

And thank you for coming full circle with this thread.
Happy detailing...

Thanks. It was very frustrating going back and forth with GM, especially since the original body shop wanted a whopping $650 for the repair. At this rate I'll have it done for under $50 with my own equipment and it will be an essential learning tool for me. It took a lot for me to do this but I finally just figured I had nothing to really lose. If it came out like trash I'd have to get it sprayed anyway. May as well learn something from it.

[garyg7133]

Just wanted to update - I wasn't able to get the results I was looking for (yet). Essentially after sanding the affected areas down to the base coat and sanding the rest of the hood so that the new clear would have something to bond to the paint did not dry as evenly as I had hoped and after wet sanding and buffing I was only able to get a moderate shine out of it. I am photo-documenting everything for this project as I am not giving up on it.

[ForceField]

You need 2K clear. This is clear coat with hardener. Once you mix the hardener in, it's only good for 24 hours.

2K clear coat: Spraymax

2 component clear coat with very high chemical, petrol and weather resistance for high-quality and long lasting sealing of repairs and new paint jobs on vehicles and motorcycles.

Advantages

Greatest abrasion and scratch resistance
Very smooth flowing
Permanent high gloss
Very good buffability
No colour tone deviation
Excellent paint condition
Also suitable at higher ambient temperatures

SprayMax 2K Urethane Clearcoat | Aerosol Touch Up | AutomotiveTouchup | 888-710-5192

2K clear is very toxic, you absolutely must wear a respirator mask when using it. You should wear safety goggles too.

FEATURES

High Gloss
Excellent flow and leveling
2 component product in 1 can convenience
Breathing respirator must be worn when using this product

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PRODUCT DESCRIPTION

11.9 ounce 2K clearcoat has the durability and gloss of a urethane clearcoat, with the convenience of an aerosol. This product contains isocyanates which are toxic to the respiratory system. A respirator mask is mandatory when using this product, or any product with isocyanates. To use: Remove the button from the top of the can and place it into the bottom and push hard. This punctures a bag releasing the isocyanate catalyst into the urethane clearcoat. Shake for 2 minutes to ensure the two components are thoroughly mixed. Once this can is activated the pot life is 24 hours. This is the same chemistry used in professional automotive body shop repairs done today. 2K clearcoat is highly recommended for it gloss, durability, flexibility, and gasoline resistance.

When you sprayed the clear, did you wait 10-15 minutes between coats? Did you overlap coats? Did you do 3-4 coats?

[garyg7133]

The 2k may be the next step. I gave each coat 20 minutes before applying and the total was 4 coats. I actually waited nearly a month before wet sanding and buffing. There ar areas where it looks great but most if it is just not as glossy as I would like or expected. Not worrying. If at first you don't succeed.... Besides, even if it doesn't come out the way I want it's still better than it looked AND it gives me time to set aside the cash for a respray. Thanks for the link to the clear though. It may be the final step. Absolutely nothing to lose.

[ForceField]

You're welcome. 20 minutes is too long in dry weather in my opinion. 10 minutes for dry weather. You want the coats going on wet, and tacky not fully dry. Read the label directions too. I think it's 30 minutes after the last base coat (or mid coat) then 10 minutes between clear coats. Good luck!

I have to do this soon as well, though on a smaller panel. That's why I became interested and started researching the topic.

[SilverBullet_01]

when you say the mask, is this good enough?



or something more advanced is needed?

[ForceField]

No those masks are not recommended. Get a dual cartridge respirator. I even saw them at Home Depot in the paint dept. They cost between $15-$40. Usually around $20 or $30. Definitely not something to skimp on.



Also I recommend safety goggles like these Dewalts, for full coverage: