VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics


Go Back   VAF Forums > Main > RV General Discussion/News
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #1  
Old 10-13-2009, 08:36 PM
zemon zemon is offline
 
Join Date: Sep 2009
Location: St. Charles, MO
Posts: 21
Default Removing Old Protective Plastic

Van's has a nice letter on their web site for folks like me who are considering buying a second hand RV kit. Among lots of good info, it says, "The plastic that coats the aluminum may be (extremely) hard to remove if the parts have been stored for many years, especially in hot climates." The empenage of the kit I am considering is from 2002; the wings and fuselage are from 2003. It's all been in a St. Louis area oven, er, garage for the past five years.

If the plastic is going to be "extremely" hard to remove, is there any way to tell before buying the kit? Is it fair to ask to peel significant chunks of it away to test? And if it is stuck on, how is it best removed?

I did some Googling and found people removing similar protective coatings from stainless steel using everything from MEK to acetone to Goo Gone to household ammonia, depending on the type of glue behind the plastic. Can all of those be used on aluminum? I am most curious about the ammonia.

Thanks,
-- Art Z.
__________________
1968 Piper Arrow (for sale at www.N7430J.com)
Soon to be RV-7A builder
Emp - ready to order as soon as my Arrow is sold
Wings - someday my wings will come
Fuse - I'll need this kit one of these days
Etc. - Yup, gotta get these parts, too...
http://cheerfulcurmudgeon.com/
Reply With Quote
  #2  
Old 10-13-2009, 09:11 PM
RScott RScott is offline
 
Join Date: Aug 2005
Location: Estacada, OR
Posts: 787
Default

First, the plastic should peel off. It may leave a bit of a adhesive residue which is easy to take off with acetone and probably lacquer thinner and lots of other stuff. I wouldn't try ammonia; not that I know anything about it but the petroleum based solvents won't hurt the aluminum; ammonia might.

I don't think it is unreasonable to ask to peel off some of the plastic. Van's advises that it be removed ASAP, so no harm should come from removing it. Besides, it gives you a chance to check for corrosion under the plastic; it does happen especially near edges. Holes are edges, too, so inspect around holes as well as edges.

If you buy the project, the easiest way to remove large sheets of plastic is to peel off 2 or 3 inches, tape that to a broom stick or similar object and using vice grips for a handle on the broom stick, roll the plastic up on the broom stick.
__________________
Richard Scott
RV-9A Fuselage
1941 Interstate Cadet
Reply With Quote
  #3  
Old 10-14-2009, 12:21 AM
Dave_Boxall Dave_Boxall is offline
 
Join Date: Mar 2005
Posts: 181
Default Warm it

We started our kit in early 2003 & finished early this year. The plastic sheet does become harder to remove over time, but warming it either by putting a heater on the other side of the aluminum or by using a heat gun set on low makes a big difference. The plastic peels off more easily and leaves a lot less adhesive residue.

If everything else is good don't let the vinyl film put you off.

Dave
__________________
Dave Boxall
RV-9A / Wilksch WAM-120 diesel. Flying since April 09
Bath England
=VAF= membership dues paid April 2017
Reply With Quote
  #4  
Old 10-14-2009, 05:21 AM
zemon zemon is offline
 
Join Date: Sep 2009
Location: St. Charles, MO
Posts: 21
Default

Quote:
Originally Posted by Dave_Boxall View Post
We started our kit in early 2003 & finished early this year. The plastic sheet does become harder to remove over time, but warming it either by putting a heater on the other side of the aluminum or by using a heat gun set on low makes a big difference. The plastic peels off more easily and leaves a lot less adhesive residue.
Dave,

What solvent did you use to remove the residue?

Thanks,
-- Art Z.
__________________
1968 Piper Arrow (for sale at www.N7430J.com)
Soon to be RV-7A builder
Emp - ready to order as soon as my Arrow is sold
Wings - someday my wings will come
Fuse - I'll need this kit one of these days
Etc. - Yup, gotta get these parts, too...
http://cheerfulcurmudgeon.com/
Reply With Quote
  #5  
Old 10-14-2009, 05:32 AM
RV10Man RV10Man is offline
 
Join Date: Jan 2005
Location: Oklahoma City, OK
Posts: 623
Default re: 6yrs

I started on my RV10 in November 2003. I had read/heard the film was tough to get off after some time. so within the past 6 months I removed all the film from the tail, wings, and the fuselage. I had no problems at all. All mine was the blue stuff, I've heard the clear is a little more difficult. Don't know for sure though.

Marshall Alexander
Reply With Quote
  #6  
Old 10-14-2009, 05:50 AM
N8RV's Avatar
N8RV N8RV is offline
 
Join Date: Mar 2005
Location: Elkhart, Indiana
Posts: 1,162
Default

I know that there are many variables that may influence how hard it becomes to remove the plastic covering, but my wings were stored in our basement since their completion over 10 years ago. After bolting them to the plane, I found that they just pulled right off, leaving no residue. It was a non-event.

Having stored plastic coated parts in extremes of temperature or sunlight probably does have a negative effect, so your mileage may vary.

Good luck.
__________________
Don McNamara
Elkhart, IN

RV-8 "Smokey"
"Too close for missles, switching to guns..."
Reply With Quote
  #7  
Old 10-14-2009, 07:48 AM
WenEng WenEng is offline
 
Join Date: Aug 2008
Location: Jacksonville, FL
Posts: 514
Default RV-6A kit 10 years old with clear plastic and..

It came right off. I started with a soldering iron to melt-cut riveting track lines. Later, the remaining squares came right off. Inside the tank skins, I removed the entire plastic with no problems.
__________________
Wendell VAF#1832
RV-6A 3/4 done...N48JE Reserved
Build site: www.mykitlog.com/weneng
Donated to VAF in 2015
Reply With Quote
  #8  
Old 10-14-2009, 08:20 AM
Brantel's Avatar
Brantel Brantel is offline
 
Join Date: Mar 2006
Location: Newport, TN
Posts: 6,575
Default

A little heat from a model airplane covering heat gun and it will peel right off...
__________________
Brantel (Brian Chesteen), 2016 =VAF= Supporter
RV-7/TU, #72823, N159SB
Lyc. O-360 carbed, HARTZELL BA CS Prop, MAG/P-MAG, Dual Garmin G3X Touch
Track N159SB (KK4LIF)
Like EAA Chapter 1494 on Facebook
Reply With Quote
  #9  
Old 10-14-2009, 08:23 AM
N941WR's Avatar
N941WR N941WR is offline
 
Join Date: Jan 2005
Location: SC
Posts: 10,816
Default

This is a good topic to search on, as it comes up from time to time. Lots of good suggestions out there.

BTW, my trick is to use WD40 and then roll it off with a section of PVC.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
Reply With Quote
  #10  
Old 10-14-2009, 10:34 AM
C-GRVT C-GRVT is offline
 
Join Date: Feb 2006
Posts: 269
Default it depends on which plastic

Some older RV kits have a white plastic coating. I can tell you from experience that this coating is almost impossble to get off if it has become brittle. You will know if it has become brittle if you attempt to peel it off and whatever you pull on simply breaks off in a tiny piece so it is impossible to peel.
I got the coating off a couple of small parts (fortunately all that was necessary) by heating with a gun and scraping the softened plastic with a paint scraper. Paint remover and goo gone didn't work well.
No seller should object to you trying to pull a piece of the plastic off to see if it comes. If you have large parts with this problem, it would be tempting just to buy a new part rather than fighting with the coating.
Bill Brooks
Ottawa, Canada
RV-6A finishing kit
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 02:45 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.