Model Boat Mayhem - Forum

Please login or register.

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

Author Topic: My paint won't dry!  (Read 2506 times)

Footski

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,060
  • Location: Malaga Spain
My paint won't dry!
« on: October 04, 2016, 05:43:11 PM »

I really find this odd. I am practicing making sea for a miniature and bought some fresh Humbrol paints to do the job. I prepared some Plasticine, which I painted in a Liberon base coat, before applying a light gloss blue, which was well stirred before applying. Whilst still wet, I applied some Humbrol gloss dark blue, followed by a little gloss white. Happy with the result, I put it on one side to dry, but 24 hours later and it refuses to play the game. It is still very sticky.
This morning I tried again, only this time, on to put of the base coat, I only applied the light blue, again after stirring well. 10 hours later and it has not dried at all.
Any ideas what I am doing wrong? I did consider whether the base coat was not the right one, but can't really see that stopping the paint from drying?
Thanks in advance.
Logged

unbuiltnautilus

  • Portsmouth Model Boat Display Team
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 2,977
  • Location: Portsmouth, England, third rock from the Sun....
Re: My paint won't dry!
« Reply #1 on: October 04, 2016, 06:25:31 PM »

This may be related, I found, very quickly, that enamel paints and vinyl kits ( monsters and the like!) don't mix. The enamels maintain a tacky finish and don't fully set. I suspect the Plasticine base is causing a similar problem. Use cheap acrylic paints, sold in those Wilco type stores ( El Wilco if you like!), for art and crafts. Usually in a squeezy tube like toothpaste. I have used these for water effects before, very effective and economical.
Logged
Listen politely, nod approvingly, then do what you want, works for me!

Crossie

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 234
  • Model Boat Mayhem is Great!
  • Location: Norfolk UK
Re: My paint won't dry!
« Reply #2 on: October 04, 2016, 06:34:44 PM »




 Was the 'Liberon' base coat that you applied over the Plasticine perfectly dry to the touch before you applied the light blue? I think that the solvents in 'Liberon' are naptha based which might interfere with the drying of the Humbrol, also Plasticine itself can interfere with paint drying as the paint dries it leaches the liquid from it (lanolin and petroleum jelly)
    Try some test pieces first to prove compatability of differing materials. Water based materials would probably be better over Plasticine.


    Trevor
.
 
Logged

Footski

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,060
  • Location: Malaga Spain
Re: My paint won't dry!
« Reply #3 on: October 04, 2016, 08:39:26 PM »

Thank s for the replies guys. The base coat was totally dry and is of the quick drying variety. Earlier this evening I tried putting a spot directly on the Plasticine and also directly on a piece of scrap wood. The wood is totally dry already, but the rest......no.
Would a gloss primer work on the Plasticine or will I still have the same problem? If so, I may try some wood glue on it with crepe paper over the top to,give me the right type of surface.....What do you think?
Logged

Crossie

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 234
  • Model Boat Mayhem is Great!
  • Location: Norfolk UK
Re: My paint won't dry!
« Reply #4 on: October 04, 2016, 09:09:06 PM »




 From your tests I would say that the plasticine IS the problem, so why not shape your 'sea' from that easy to form material and then brush a thin layer of plaster over the plasticine, allow that to dry and this plaster surface will take any paint you wish without problems.
                                            Trevor
Logged

Footski

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,060
  • Location: Malaga Spain
Re: My paint won't dry!
« Reply #5 on: October 04, 2016, 10:19:03 PM »

Cheers Trevor,
I will give that a go in the morning...
Logged

Onetenor

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 270
  • Model Boat Mayhem is Great!
  • Location: Meliden N Wales
Re: My paint won't dry!
« Reply #6 on: October 06, 2016, 10:51:57 PM »

Why not just use plaster or filler as the base
Logged

Onetenor

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 270
  • Model Boat Mayhem is Great!
  • Location: Meliden N Wales
Re: My paint won't dry!
« Reply #7 on: October 06, 2016, 11:17:18 PM »

Another idea is a coat of shellac/french polish over the Plasticine
Logged

tigertiger

  • Global Moderator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,929
  • Location: Kunming, city of eternal springtime, SW China.
Re: My paint won't dry!
« Reply #8 on: October 07, 2016, 04:33:48 AM »

You may need to find a base coat that will dry over oily surfaces. Plasticine is made with petroleum jelly and fatty acids.
I suspect that even if you coat it with plaster/paper, the oils will leach through and cause the same problem.

As shellac is alchol based, it may be a suitable option.

Just a thought.
Logged
The only stupid question is the one I didn't ask

Footski

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 3,060
  • Location: Malaga Spain
Re: My paint won't dry!
« Reply #9 on: October 07, 2016, 07:32:33 AM »

SUCCESS!
I triedthe plaster and that failed, but a simple coat of white PVA glue worked a treat. It also smoothed the surface a little, which should give a slightly rolloing smooth sea effect when finished. I did use up most of my Plasticine though trying out the various methods......
Thanks for all the advice guys.
Logged

Onetenor

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 270
  • Model Boat Mayhem is Great!
  • Location: Meliden N Wales
Re: My paint won't dry!
« Reply #10 on: October 07, 2016, 11:18:26 AM »

Salvage the Plasticine by scraping/ cutting off the spoit paint and balling up again. Another base you could use is the Air Drying clays for modelling Once dried out  it will take anything
Logged

Crossie

  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 234
  • Model Boat Mayhem is Great!
  • Location: Norfolk UK
Re: My paint won't dry!
« Reply #11 on: October 07, 2016, 11:34:31 AM »




 That's good Footski ! Lots of learning about materials is one of the things that keeps our hobby interesting.


                               Trevor
Logged

Peter Fitness

  • Global Moderator
  • Full Mayhemer
  • *****
  • Offline Offline
  • Posts: 6,802
  • Location: Wyrallah, near Lismore NSW Australia
Re: My paint won't dry!
« Reply #12 on: October 07, 2016, 10:45:23 PM »

How about some photos Barry? I'm curious as to how you managed the sea effect.


Peter.
Logged
Pages: [1]   Go Up