Model Boat Mayhem

Please login or register.

Login with username, password and session length.
Pages: [1]   Go Down

Author Topic: paint lifting  (Read 2617 times)

colin-stevens

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 731
  • Location: Southwater
paint lifting
« on: March 05, 2008, 05:57:53 pm »

got a resin moulding. made myself. it was left to dure for quite a while. rubbed down. sparayed with Halfords filler primer. detail added, with cyno. resprayed with Hafords primer. rubbed down, resprayed, rubbed down. finallly got a smooth finish, and the detail blended in nicely. then i noticed that in places the paint cracked. i could then peel the paint of, and the detail. decided to rub all the paint of, back to the resin.
How can i avoid this happeneing again? kind of hacked off.
colin
Logged
grumpy old XXX

Martin (Admin)

  • Administrator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 23,363
  • Location: Peterborough, UK
    • Model Boat Mayhem
Re: paint lifting
« Reply #1 on: March 05, 2008, 07:17:28 pm »

I had a problem like that when building Jan's Puffer, turned out to be oil  / dirt from my own fingerprints!  >:(
Logged
"This is my firm opinion, but what do I know?!" -  Visit the Mayhem FaceBook Groups!  &  Giant Models

colin-stevens

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 731
  • Location: Southwater
Re: paint lifting
« Reply #2 on: March 05, 2008, 07:25:10 pm »

yer, but i had well washed it.
and handled it to a minimum once washed.
Logged
grumpy old XXX

John W E

  • I see no ships !!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 8,813
  • Location: South shields
Re: paint lifting
« Reply #3 on: March 05, 2008, 07:37:18 pm »

Hi there Colin, what type of resin did you use, as some specialised resins contain a form wax.

aye
john e
bluebird
Logged
Knowledge begins with respect
But fools hate wisdom and discipline

colin-stevens

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 731
  • Location: Southwater
Re: paint lifting
« Reply #4 on: March 05, 2008, 08:18:50 pm »

was wondering on wether i had left some wax on.
bog standard resin i think, but i do seem to have a very polished finish, even after rubbing down for the last week.
seem cyno hasnt stuck either, i will try gluing another peice of detail on and see if that stays
oolin
Logged
grumpy old XXX

John W E

  • I see no ships !!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 8,813
  • Location: South shields
Re: paint lifting
« Reply #5 on: March 05, 2008, 08:59:32 pm »

hi ya there Colin, you could try washing the area down with Acetone.

This may also give you a good etched surface to paint upon if you allow the acetone to evaporate from the surface.   The surface will become tacky or should become tacky for a while.

aye
john e
bluebird
Logged
Knowledge begins with respect
But fools hate wisdom and discipline

colin-stevens

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 731
  • Location: Southwater
Re: paint lifting
« Reply #6 on: March 05, 2008, 09:13:06 pm »

will give that a go, was on of my plans.though not easy for me to get. the other was meths, if that fails, i can always drink it. drown my sorrows
good health
colin
Logged
grumpy old XXX

John W E

  • I see no ships !!
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 8,813
  • Location: South shields
Re: paint lifting
« Reply #7 on: March 05, 2008, 09:18:19 pm »

Hi ya there Colin, methylated spirit not quite as good, because the resin will have already hardened whereas Acetone chemically attacks the resin.   Good luck.  No drinking that Meths mind - whisky cheaper  :) :)  Colin what release agent did you use for the mould?

aye
john e
bluebird
Logged
Knowledge begins with respect
But fools hate wisdom and discipline

Stavros

  • Guest
Re: paint lifting
« Reply #8 on: March 05, 2008, 10:32:01 pm »

Colin I personally think as well that the resin is contaminated with wax now the bets thing you can do with this is to go and find a paint supplier and buy a Gallon of either spirit wipe also known as panel wipe and wash the parts off in this.I know a gallon is a lot but it is usually sub £10 and it goes very far.If you are painting anything really you should be using this product,it is the ONLY known product that will degrease prior to painting.This is used by EVERY bodyshop prior to painting a vehicle.IT DOES WORK.You read every kit ins and they say wash the hull In warm soapy water prior to painting what a load of baloney,panel wipe is the way to go.


Stavros
Logged

White Ensign

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 779
  • Limits must be limited!
  • Location: Stuttgart, Germany
Re: paint lifting
« Reply #9 on: March 11, 2008, 07:05:23 pm »

Colin, as Stavros said- in the most cases it`s the release-agent which is not washed down. I`ve had a similar case, where I just used wax as a release agent. Some of the wax was "locked" in the mould and no matter how hard I tried, always had some spots where the colour peeled off.
Since I use PVA (Polyvenylalcohol) after waxing I`d never had a problem again. Just wash it with soap-water and a hard brush and you`re free of any release- rests.
The stuff recommended from Stavros is also new to me, but it doesn`t mean anything as I bet it`s not available in germany either.

Best way now (might sound a bit hard) is to wash down all the paint with the recomended panel-wipe and start brandnew.

Hope that was out of help anyway,
Jörg
Logged
When God created planet earth, he made it with 75% of water. Bet he had the modelboaters on his mind!

Stavros

  • Guest
Re: paint lifting
« Reply #10 on: March 11, 2008, 07:16:45 pm »

Jorg it is available in Germany go in to any car repair shop where they spray cars and ask them what they use to degrease prior to painting.It is probably called something totally different out there but I gauarantee you they will use a degreaser.

Stavros
Logged

colin-stevens

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 731
  • Location: Southwater
Re: paint lifting
« Reply #11 on: March 11, 2008, 07:18:52 pm »

Cheers guys. Done what Stavros reckomended and got myself down to a paint shop and bought a product called Antisill 770, small can. There were two other products, both sold in 1 gallon cans. Probably evaporate before i used it. Hopefully its done the trick.
Thanks all
colin
Logged
grumpy old XXX
Pages: [1]   Go Up
 

Page created in 0.107 seconds with 22 queries.