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Oops. How did that happen?

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  • Member since
    June, 2017
  • From: Winter Park, FL
Oops. How did that happen?
Posted by fotofrank on Wednesday, August 09, 2017 7:37 AM

Yesterday I primed the T-6 I'm working on with Alclad II Gloss Black Primer. This morning I'm shooting the airplane with Alclad Aluminum. I had finished the underside and I was painting the topside. The nose and the masked canopy were painted and I was beginning the wing topsides. I was painting the right wing when I looked at the left wing and there was a blob of Aluminum paint at the leading edge of the wing near the tip and about half way back to the airleron. How did that happen? The cup on my Badger 200 doesn't have a cover and some paint must have slopped over the edge of the cup. When I'm using Alclad I try to only fill the cup halfway or less. I immediately wiped the Aluminum paint off the wing and I was left with an oval spot near the leading edge. I cleaned the primer off the wing with lacquer thinner and I'll re-prime the wing tomorrow. I am concerned though. The spot where the blob of paint hit the wing seems to be soft. I'm hoping that tomorrow the spot will be firm enough to accept some sanding and a fresh coat of primer. Does the lacquer paint attack the plastic? Is that why the spot seems to be soft?

  • Member since
    March, 2007
  • From: Northeast WA State
Posted by armornut on Wednesday, August 09, 2017 8:21 AM

Yes lacquer attacks plastic,( styrene), some modelers us it as glue because of its capillary properties. I would recommend letting it dry for a minimum of 48hrs before even touching the affected area. Once the solvent flashes off,( evaporates completely), then you should be able to begin repair.

we're modelers it's what we do

  • Member since
    June, 2017
  • From: Winter Park, FL
Posted by fotofrank on Wednesday, August 09, 2017 9:10 AM

Thanks, Armornut. The airplane will sit until Friday then.

  • Member since
    March, 2007
  • From: Northeast WA State
Posted by armornut on Wednesday, August 09, 2017 12:52 PM

Your welcome sir. Keep us posted on the repair so if we have a boo boo we'll know what to do. HAPPY MODELLING.

we're modelers it's what we do

  • Member since
    December, 2013
  • From: Orlando Florida
Posted by route62 on Wednesday, August 09, 2017 1:47 PM

I hate when that happens, You're in the zone, the paint is laying down great and paint slops out of the cup onto your work.

when I am worried that I may get carried away while spraying and some of the paint may slop out I will take a little plastic cling wrap and cover the cup.  Pop 2-4 pin holes in the plastic so the cup can pull air.  If your paint flow is resticted, pop a few more holes.

  • Member since
    June, 2017
  • From: Winter Park, FL
Posted by fotofrank on Wednesday, August 09, 2017 2:19 PM

Good call. I will definitely do that. I just hope I can repair the spot on the wing. The accident would happen on the upper surface of the wing and not the lower...ugh!!

  • Member since
    May, 2004
  • From: Land of Lakes
Posted by cbaltrin on Wednesday, August 09, 2017 2:51 PM

Cover your paint cup with Parafilm. Problem solved.

  • Member since
    December, 2013
  • From: Orlando Florida
Posted by route62 on Wednesday, August 09, 2017 3:11 PM

Since you have to shoot primer again, can you mask off the area back to the closest panel lines and shoot a different shade of alclad to give some tonal variation?

You could even shoot the masked off area with a grey primer and shoot the original alclad color and you will get a different shade.

Just a suggestion.

  • Member since
    June, 2017
  • From: Winter Park, FL
Posted by fotofrank on Wednesday, August 09, 2017 3:34 PM

I have Alclad gloss black and flat black primers. If I'm able to sand the area smooth in a couple of days, I may try to make the spot look like repaired battle damage. After all these LT-6G's were used as forward air controllers and artilliary spotters in Korea. Getting hit by ground fire would have been a common occurence I think.

  • Member since
    September, 2012
Posted by GMorrison on Wednesday, August 09, 2017 5:58 PM

Too fast between coats.

  • Member since
    January, 2013
Posted by BlackSheepTwoOneFour on Wednesday, August 09, 2017 7:01 PM

That^^^

I would use Testors gloss black instead of Alclad's gloss black primer. After the last bad batch fiasco, I wouldn't even trust their gloss black primer again.

  • Member since
    June, 2017
  • From: Winter Park, FL
Posted by fotofrank on Wednesday, August 09, 2017 8:14 PM

I used Testors gloss black enamel for the primer on my P-82. It did a good job as a primer but after a week of just sitting, the paint never seemed to really cure. On the day I shot the Alclad Aluminum, the black still felt a little tacky. The Aluminum went on OK and the airplane looks good on the shelf. This Alclad gloss black seems OK. Two coats covered the T-6 really nicely and the Alclad Aluminum was going on very nicely until the blob of paint hit the wing. I'm going to take the rest of the primer off the upper wing surface up to where the outer panel meets the center section, then I'll prime the outer panel again to get a good smooth finish before shooting the Aluminum again.

  • Member since
    January, 2013
Posted by BlackSheepTwoOneFour on Wednesday, August 09, 2017 9:08 PM

Sounds like you laid down the gloss black pretty thick. That might be the reason it was still tacky after a week. I don't know. Weather and humidity can also be the cause as well.

  • Member since
    July, 2013
Posted by modelmaker66 on Thursday, August 10, 2017 2:10 AM

I know enamel takes a day or two to dry, but it was probobly too heavy a coat like others have said. I don't have an answer to correct it though. I depend on the guys here for that. Good luck. Let ud know how you solve it and how it turns out please.

  • Member since
    June, 2017
  • From: Winter Park, FL
Posted by fotofrank on Thursday, August 10, 2017 8:06 AM

Well, I have to do all of my painting on my patio. I've closed it up as well as I can. The patio has vinyl windows but they don't seal very well. I also have a 12,000 btu portable AC for the patio that helps control temperature and humidity somewhat.

I just finished cleaning off the wing of the T-6. I'm going to give it another day or two before I try to fix the patch where the paint landed. Hopefully I'll be able to sand the spot and eliminate the blemish before I paint again.

The next three projects I have in the queue will be painted with MM enamels. They will be painted with the standard USAAF O.D. upper and neutral gray lower. I don't anticipate any difficulty with those three airplanes in the paint booth.

I do appreciate evryone's input on this. I've gotten some good pointers. My wife has some adhesive kitchen wrap that I'll try on my airbrush to prevent spillage from the cup in the future. I'll be keeping y'all posted as to my progress.

  • Member since
    January, 2013
Posted by BlackSheepTwoOneFour on Thursday, August 10, 2017 12:17 PM

Another possibility is you didn't thin it enough. Just a thought....

  • Member since
    June, 2017
  • From: Winter Park, FL
Posted by fotofrank on Sunday, August 13, 2017 9:31 AM

Here is the blemished wing. Route62 and I examined the wing yesterday and we decided the blemish is not a real issue. He buffed the area with a piece of 800 grit sanding film and today I'll buff it again with a Micro Mesh pad. The spot is very smooth to the touch though. Tomorrow I'll prime the wing again and Tuesday or Wednesday I'll finish with the Alclad. Fortunately a USAF decal will cover part of the area.

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