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mconnelley
sage
Reged: 03/14/06
Posts: 271
Loc: Fremont, CA
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Hello:
I painted the second coat of spray paint on a scope I'm working on with a blue gloss spray enamel. One area of the part I painted (the rim of an aluminum casting) is still quite sticky although the rest of the part is nice and dry. Anyone have any ideas of what I can do to get this part to dry? Just wait? Stick it in the oven for a little while? Scrape it off and repaint? Any ideas as to why one area would remain tacky while the rest of the paint job would be dry? It's the second coat out of this can, it's a new can, and I was spraying onto a surface with a few coats of primer.
Also, is there a way to avoid orange peel? I've been trying to apply thin coats.
Cheers
Mike Connelley
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DennisF
Pooh-Bah
Reged: 03/03/06
Posts: 1184
Loc: Northern IL
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I wouldn't try the oven. Not enough control. If you have a halogen lamp, I've used a 300w to hurry up drying on a paint job. Don't put it too close. I usually put it 1-2 feet away. I just use my hand to gauge the heat at a given distance.
FWIW, I usually rough up the surface of what I'm painting with 800-1000 grit sandpaper to give the paint something to grab. If that's not available, I'll use OOOO steel wool. With a primer coat and a couple of top coats, you won't even know they're there.
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10" XTi
C6 SE
C8 SE
C8 (late 90's?)
SV80ED
SV102ED
SV M1
Original AYO EzTouch mount
LM Teegul
Gone-ETX 125, C80, ED80SF, PortaMount
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Manny Myles
Post Laureate
Reged: 11/29/05
Posts: 3461
Loc: Flatlandia
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I agree with the above recommendation and use a heat lamp.
m2
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Light travels faster than sound. This is why some people appear bright until you hear them speak
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Spoonsize
Vendor/Clothing
Reged: 08/27/04
Posts: 3293
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Hold it under the tap, and flood it with COLD water.
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Steve Durham
www.margesmonograms.com
(Marge made me do it)
"Nobody get's in to see the WIZARD, Not Nobody, Not Nohow"
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Wes James
Post Laureate
Reged: 04/12/06
Posts: 3453
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2 things typically cause orange peel: 1) silicon contamination on the surface you're painting, and 2) high humidity.
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Wes
Atlantic Beach, FL
Some bino’s from Miyauchi 5x32 Binon's up through Garrett 20x110 Signature's,
Some telescopes from a Stellarvue 80mm NHNG up through a couple of 8” reflectors…
And a wonderful 4.25" Delmarva Shiefspiegler!
Some good friends, made here on C/N.
Oh- several cats and a wonderful wife!
Anyone want a cat???? :-O
"When your work speaks for itself- Don't Interrupt" -Gamble Rogers
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RobVG
professor emeritus
Reged: 01/09/06
Posts: 738
Loc: Seattle Washington
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Another thing that can cause an orange peel look is too thin a coat. If you apply a light first coat and let it dry for 5 minutes it will act like a glue for the second coat. You can then paint a wet second coat- the paint should flow together with no orange peel. I try to put it on almost to the point of running.
Works for me 
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C11 SGT(XLT)CG-5
Observatory (page 5)
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nightstalker
sage
Reged: 03/30/07
Posts: 252
Loc: Great South Land
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You did use an etch primer on the aluminium casting before the enamel ?..seems strange ??
Edited by nightstalker (01/02/08 05:07 AM)
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