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-   -   Ziroli AT-6 clear coat problem (http://www.rcuniverse.com/forum/rc-warbirds-warplanes-200/11158671-ziroli-6-clear-coat-problem.html)

koenig427 07-17-2012 08:37 AM

Ziroli AT-6 clear coat problem
 
1 Attachment(s)
I recently traded for this AT-6 and the guy I got this from told me that the clear coat was messed up and he started to sand the clear down. Some of the really bad spots he sanded all the way to the wood but most of the places are just sanded alittle.

It seams to me that the nitro fuel was eatting at the clear and turning the off white into yellow. whats the best way to fix this problem? Sand all the clear off and reclear or do I have to same all the way down and reshoot the color?


Another side question whats the best servos for the main control surfaces?

ESSAR 07-17-2012 09:48 AM

RE: Ziroli AT-6 clear coat problem
 
You don't need to remove all the clear, just feather it out where it's not smooth with fine grit paper maybe 400 or 600, then do your touch ups, hopefully if your color match is good they will blend away seemlessly. once the aircraft is touched up scuff the whole thing with a red 3M scotch brite pad, wash with alcohol or a similar mild degreaser and re-clear. I would use a urethane type clear because typically they are more chemically resistant, But I have used water based clear with a cross linker that is also fuel resistant.
here is a link for the nelson's clear, it also comes in a flat finish:
http://nelsonhobby.com/hobby_paint.php
I am an aircraft refinisher by trade so I paint a lot of airplanes at work but I have more fun painting the models like these!
Nice plane by the way, good luck.

Essar.

STUKA BARRY 07-17-2012 05:08 PM

RE: Ziroli AT-6 clear coat problem
 

Quote:

ORIGINAL: koenig427

I recently traded for this AT-6 and the guy I got this from told me that the clear coat was messed up and he started to sand the clear down. Some of the really bad spots he sanded all the way to the wood but most of the places are just sanded alittle.

It seams to me that the nitro fuel was eatting at the clear and turning the off white into yellow. whats the best way to fix this problem? Sand all the clear off and reclear or do I have to same all the way down and reshoot the color?


Another side question whats the best servos for the main control surfaces?
Great looking T-6, but GET RID OF THAT PROPELLER!!!!

koenig427 07-18-2012 05:37 AM

RE: Ziroli AT-6 clear coat problem
 

Quote:

ORIGINAL: ESSAR

You don't need to remove all the clear, just feather it out where it's not smooth with fine grit paper maybe 400 or 600, then do your touch ups, hopefully if your color match is good they will blend away seemlessly. once the aircraft is touched up scuff the whole thing with a red 3M scotch brite pad, wash with alcohol or a similar mild degreaser and re-clear. I would use a urethane type clear because typically they are more chemically resistant, But I have used water based clear with a cross linker that is also fuel resistant.
here is a link for the nelson's clear, it also comes in a flat finish:
http://nelsonhobby.com/hobby_paint.php
I am an aircraft refinisher by trade so I paint a lot of airplanes at work but I have more fun painting the models like these!
Nice plane by the way, good luck.

Essar.

doesn't sound too bad, i'll have to give that a try. I plan on getting it flying and then over the winter redo the clear coat on it.

AmishWarlord 07-18-2012 05:56 AM

RE: Ziroli AT-6 clear coat problem
 
1 Attachment(s)


Did the clear coat "fail" gum crack and peel off up or did it just yellow?

Most clearcoats will turn yellow with time so that's no bid deal.

I really liked Black Baron clear coat years ago. It would turn yellow in time though.

Some of the later Dynathust props had a defect.

The cheap manufacturer decided to save money by leaving out 1/2 the fiberglass.

They are known to break in flight. Dynathust went under because of this.

Anyway that was in the 90's so you know that prop is OLD!

Time to change out to a nice Master Airscrew Classic!










koenig427 07-18-2012 08:55 AM

RE: Ziroli AT-6 clear coat problem
 

Quote:

ORIGINAL: AmishWarlord



Did the clear coat ''fail'' gum crack and peel off up or did it just yellow?

Most clearcoats will turn yellow with time so that's no bid deal.

I really liked Black Baron clear coat years ago. It would turn yellow in time though.

Some of the later Dynathust props had a defect.

The cheap manufacturer decided to save money by leaving out 1/2 the fiberglass.

They are known to break in flight. Dynathust went under because of this.

Anyway that was in the 90's so you know that prop is OLD!

Time to change out to a nice Master Airscrew Classic!










The clear just yellowed, So I wanna take it back down and re clear it.

Also ill be putting a nice new prop on it before flight. That was the only prop I had at that time.


AmishWarlord 07-18-2012 09:35 AM

RE: Ziroli AT-6 clear coat problem
 

Hey by the way that Saito 450 looks great in that AT-6.

I bet that thing sounds awesome!

What kind of set up does the engine have? As in fuel tank size, onboard glow and exhaust?



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