VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > Model Specific > RV-7/7A
Register FAQ Members List Calendar Today's Posts

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 04-20-2019, 08:07 PM
bret's Avatar
bret bret is offline
 
Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,828
Default

Quote:
Originally Posted by Mike S View Post
Brake Kleen works well to remove Sharpie.
As long as it is not the California blend. Ca took all the fun aggressive stuff out of these products. if it says not for sale in CA, you may do better just buying orange juice to clean anything. Sorry, just a technician venting here
__________________
7A Slider, EFII Angle 360, CS, SJ.
Reply With Quote
  #12  
Old 04-21-2019, 02:46 AM
mike newall's Avatar
mike newall mike newall is offline
 
Join Date: Jan 2005
Location: Yorkshire, England
Posts: 2,052
Default

Sharpie will bleed through to top coat..... ask me how I know

If it is on bare aluminum, cellulose thinners removes but you may see a ghost on the ali - it won't grin, it is just the reaction of the Sharpie solvent.

If you have primed over the Sharpie and it has grinned through, you will need to remove the primer either mechanically or by thinners if you are using a 2 part system as opposed to an epoxy system.

I always have a 120x plastic Coke bottle of cellulose thinner on the bench - useful for all sorts of cleaning, de greasing etc etc.
__________________
"I add a little excitement, a little spice to your lives, and all you do is complain!" - Q

Donated in 2020
Reply With Quote
  #13  
Old 04-21-2019, 07:48 AM
jcarne's Avatar
jcarne jcarne is offline
 
Join Date: Jul 2016
Location: Worland, Wyoming
Posts: 1,365
Default

It's my understanding that the hinges have a clear anodize coat on them. I noticed if you let sharpie stay for long periods of time on anodize or powder coated parts almost nothing works unless you remove the coat as well. I too couldn't get marks off them hinges so I left it knowing that the seats would cover them.
__________________
Jereme Carne
PPL
RV-7A Emp. done
Wings done
Fuselage done
Finish kit almost done
Exempt but gladly paying!

Last edited by jcarne : 04-21-2019 at 07:54 AM.
Reply With Quote
  #14  
Old 04-21-2019, 11:24 AM
JonJay's Avatar
JonJay JonJay is offline
 
Join Date: Jan 2007
Location: Battleground
Posts: 4,348
Default

I suspect the chemicals in the sharpie ink might etch the surface of aluminum slightly. Even after the color is gone, you can still see a faint line.
Any chemists out there?
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.

RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
Reply With Quote
  #15  
Old 04-21-2019, 11:26 AM
1001001's Avatar
1001001 1001001 is offline
 
Join Date: Dec 2014
Location: Just Minutes from KBVI!
Posts: 1,039
Default

Quote:
Originally Posted by JonJay View Post
I suspect the chemicals in the sharpie ink might etch the surface of aluminum slightly. Even after the color is gone, you can still see a faint line.
Any chemists out there?
Chemical engineer, not chemist. I doubt there is much chemical interaction between the solvents in the ink and aluminum. Probably just slight surface scratching from the fiber applicator in the pen.

You could test this hypothesis by making various marks with different pressures on the pen, wiping the ink away with acteone, and then comparing the residual marks.
Reply With Quote
  #16  
Old 04-22-2019, 09:05 AM
Draker's Avatar
Draker Draker is offline
 
Join Date: Jun 2016
Location: Livermore, CA
Posts: 397
Default

Ray, acetone is my go-to solvent for cleaning everything in the kit, including the aluminum markings from the factory, sharpie pens, and undesired primer. I've gone through several gallons so far. It's nasty but apparently not as nasty as MEK which the great state of California doesn't let us buy. I found it doesn't clean sharpie off the powder-coated parts. It also won't remove those paper part-number-stickies, which you need to scrape off and then use something like Goof Off Adhesive Remover.
__________________
Ryan Drake
Livermore, CA
https://stiletto.smugmug.com/RV7
Donated 12/16/2019
RV-7A (N12VD): Empennage and wing kits complete minus fiberglass, fuselage and wiring complete. Canopy complete minus fiberglass. Waiting for the engine to come!
Reply With Quote
  #17  
Old 04-22-2019, 09:58 AM
fl-mike's Avatar
fl-mike fl-mike is offline
 
Join Date: Jul 2005
Posts: 1,346
Default

Quote:
Originally Posted by Draker View Post
It also won't remove those paper part-number-stickies, which you need to scrape off and then use something like Goof Off Adhesive Remover.
Peel off what you can with a popsicle stick, and then use Gorilla Tape to dab off the leftover adhesive. Rub your (always) dirty finger over the area to detect any missed adhesive residue.
__________________
Mike W
Venice, FL
RV-6A. Mattituck TMX O-360, FP, GRT Sport EFIS, L3 Lynx NGT-9000
N164WM
N184WM reserved (RV-8)....finishing kit in progress. Titan IOX-370
Reply With Quote
  #18  
Old 04-22-2019, 12:29 PM
xblueh2o xblueh2o is offline
 
Join Date: Apr 2011
Location: SF East Bay
Posts: 852
Default

Depends on how long the sharpie mark has been on.
If you put it on, do whatever you are going to do and then take it off it will come off with denatured alcohol. If it has been on a while it will take acetone to remove it.
I have three cans of solvent under my bench. I always start with denatured alcohol, if that doesn't work then I get the acetone. When that doesn't work I pull out the nuclear option, MEK.
__________________
Sam
RV-8 with the Showplanes Fastback conversion
Emp completed except for glass work
Wings completed except for bottom skin and glass work
Fuselage underway
N18451 reserved
Reply With Quote
  #19  
Old 04-22-2019, 01:51 PM
rapid_ascent rapid_ascent is offline
 
Join Date: Mar 2008
Location: Dublin, CA
Posts: 1,261
Default

Well I went ahead and installed the seat floors so I'll have to be much more careful with any further experimentation of removal.

It was interesting though. I had a couple of hinges where it came off without any problem. Maybe I used a different marker. I also had some more recent marks that I just added before I removed the hinges from the floor pieces. Those came off without any issue. So it seems to just be the marks that have been on for a long period. They are just a faint blue now but still visible.
__________________
Ray Tonks
2020 Donation Paid
Titan IOX-370, Dual PMAGs, 9.6:1 Pistons, FM-150
RV-7 Fuselage in progress
* Cabin Interior - In progress
RV-7 SB Wings
* Both Wings fully skinned
* Fuel Tanks Complete - No leaks finally
* Ailerons Complete
* Flaps Complete
RV-7 Empennage - Complete (a little fiberglass work left)
Vans Training Kit # 2 - Complete
RV-7 Preview Plans
Vans Training Kit #1 - Complete
EAA Sheet Metal Class - Complete
Reply With Quote
  #20  
Old 04-22-2019, 05:30 PM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 5,516
Default

Quote:
Originally Posted by 1001001 View Post
Chemical engineer, not chemist. I doubt there is much chemical interaction between the solvents in the ink and aluminum. Probably just slight surface scratching from the fiber applicator in the pen.

You could test this hypothesis by making various marks with different pressures on the pen, wiping the ink away with acteone, and then comparing the residual marks.
In have (tested), it does (scratch), just like you said. Mechanical mark.

I wrote final assembly notes on the wings of things as they were flight ready. They were removed after first flight. Light polishing and they disappear.
__________________
Bill

RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 03:43 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.