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Why using primier?

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  • Member since
    November 2005
Why using primier?
Posted by Anonymous on Monday, December 22, 2003 2:28 AM
Hi guys:

I just have a question that I don understand. Why do we need to spray surface primier before painting? Why not just spray those paint directly to the model after wash those release mold agent? Thanks for your answers :)

From a newbie modeler :)
  • Member since
    December 2002
  • From: United Kingdom / Belgium
Posted by djmodels1999 on Monday, December 22, 2003 5:16 AM
I modelled many years without using any primer at all, so I'm fairly confident that you can still do it without too many problems. I only started using primer once I branched out into metal figures (for my dioramas) and realised that without a primer coat, the paint was fragile and did not resist long to any touching/handling...

Nowadays, most of my kits are 'upgraded' with metal, resin bits (wire, foil, photo-etched parts, accessories,..) and the primer give me an even surface to work on. Without it, I'd have paint sticking well to plastic, not so well to metal and possibly not at all on resin bits...

Also, many years ago, I did not do any weathering, while nowadays I do, and this treatment can be harsh (drybrushing in particular) to the kit. Unprimed resin and metal would suffer more than plastic...

So, all in all, I'd advise you to prime your models.
  • Member since
    May 2003
  • From: The flat lands of the Southeast
Posted by styrene on Monday, December 22, 2003 8:24 AM
Priming can serve a couple purposes:
1. It gives your topcoat tooth, like dj mentioned above.
2. It allows you to see any mistakes that need to be corrected prior to shooting your topcoat.
3. For me, an armor builder, I "prime" my models flat black, and then spray on a light topcoat so that the prime coat peeks through subtly; the primer acts as the very first step in the weathering process.
4. Lastly, depending on the color of the primer and the color of your topcoat, priming has the potential of either increasing or decreasing the intensity of your topcoats.

Gip Winecoff

1882: "God is dead"--F. Nietzsche

1900: "Nietzsche is dead"--God

  • Member since
    November 2003
  • From: Manila, Philippines
Posted by shrikes on Tuesday, December 23, 2003 11:25 AM
Does it have to say "primer" on the can inorder for it to be primer, or can i use any paint (mixed differently or something)?
Also, i see that there are different primers in the stores... A metal one and a plastic one, and in different colors (white and gray, i think). Does it matter which i use? thanks. Smile [:)]
Blackadder: This plan's as cunning as a fox that used to be Professor of cunning at Oxford University but has now moved on and is working with the U.N at the high commission of cunning planning
  • Member since
    December 2002
  • From: United Kingdom / Belgium
Posted by djmodels1999 on Tuesday, December 23, 2003 12:21 PM
I use cans that say 'primer' from the local automotive shop. Having said that, for metal figures, I used to use Humbrol's enamel flat white (with a touch of thinner to make it more fluid)...
  • Member since
    May 2003
  • From: The flat lands of the Southeast
Posted by styrene on Monday, December 29, 2003 6:45 AM
Bottled or canned paint do not have to say "primer" on them to be used as such. Any flat paint can be used as a primer; just make sure that the "primer" you use is compatible with your topcoat. Lighter colors (grays and whites) can be used for lighter or dark color topcoats, while darker grays, etc. should only be used with dark topcoats. I typically use Testor's flat black and gray enamels as my primer coats, and have periodically used Floquil Reefer White with good success.
Gip Winecoff

1882: "God is dead"--F. Nietzsche

1900: "Nietzsche is dead"--God

  • Member since
    November 2005
Posted by Anonymous on Monday, December 29, 2003 8:59 AM
I primarily use acrylics for airbrushing. Does it matter if I use an enamel or acrylic as my primer coat or is one better than the other?
  • Member since
    December 2002
  • From: Harrisburg, PA
Posted by Lufbery on Monday, December 29, 2003 9:48 AM
Bodner007,

I've had good luck using Testors spray enamel (light grey) as a primer for Testors Model Master acrylics. The key is letting the primer coat dry for a good long time (I waited a week) before applying the acrylics. I may have waited too long, but I wanted to be sure there was no problem.

From what I understand, acrylics over enamels is fine, but one shouldn't do things the other way as the enamel is somewhat "hot" and will eat into the acrylic paint.

Regards,

-Drew

-Drew

Build what you like; like what you build.

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