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General Ship Modeling: Painting & Color Schemes
Topics on painting and paint schemes are grouped here
Prepping Plastic
AlexB1969
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Alabama, United States
Joined: July 12, 2013
KitMaker: 205 posts
Armorama: 120 posts
Posted: Tuesday, September 23, 2014 - 08:36 AM UTC
Hi everyone.

One challenge I face is prepping plastic for painting with my airbrush. I am nearing the paint stage on my current build and would like to avoid the issues I have faced in the past (paint adhering to the surface of the model and paint running down the sides). I live in a very small apartment so big tubs full of warm water and Dawn liquid detergent don't work for me. I have considered rubbing down the model several times with isopropyl. Are there any other suggestions.

Thanks.

Alex
pseudorealityx
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Georgia, United States
Joined: January 31, 2010
KitMaker: 2,191 posts
Armorama: 1,814 posts
Posted: Tuesday, September 23, 2014 - 08:48 AM UTC
I've never washed any of my models before painting... but I have to ask... do you not have a sink?
AlexB1969
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Alabama, United States
Joined: July 12, 2013
KitMaker: 205 posts
Armorama: 120 posts
Posted: Tuesday, September 23, 2014 - 08:55 AM UTC
I have a sink yet it's not big enough and I don't want to wash the model in the sink I use for preparing food items 8-). I used to live in a home with a huge utility sink. It was the best.
Tojo72
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North Carolina, United States
Joined: June 06, 2006
KitMaker: 4,610 posts
Armorama: 3,449 posts
Posted: Tuesday, September 23, 2014 - 09:17 AM UTC
I never wash mine either.Only resin or white metal.If you have paint adhesion issues-try priming with Mr 1200 or Tamiya Fine in the rattlecan.This way you don't have to worry about knocking off parts while trying to wash down a model.
justsendit
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Colorado, United States
Joined: February 24, 2014
KitMaker: 2,951 posts
Armorama: 2,411 posts
Posted: Tuesday, September 23, 2014 - 09:29 AM UTC
You don't need a big tub, do you? Plastic storage and food containers can be purchased at supermarkets and big-box stores. Or one of my favorites ... used plastic food containers. I try to repurpose anything in my path!



ómike

PS: I don't go anywhere near a sink/drain with all of those tiny parts.
Grauwolf
#084
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Quebec, Canada
Joined: September 14, 2005
KitMaker: 2,392 posts
Armorama: 686 posts
Posted: Tuesday, September 23, 2014 - 12:14 PM UTC
Hi Alex,

Based on the space restrictions you describe, the ISO wash is
your best method.

Is that the 3ft u boat you are going to prep?

Cheers,
Joe

Gremlin56
Joined: October 30, 2005
KitMaker: 3,897 posts
Armorama: 30 posts
Posted: Tuesday, September 23, 2014 - 05:37 PM UTC
I seldom wash a model before assembly and painting. I agree with Anthony that a coat of primer, (I just love Vallejo's acrylic primers), will generally be all that you need to supply a good base.
Biggles2
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Quebec, Canada
Joined: January 01, 2004
KitMaker: 7,347 posts
Armorama: 5,923 posts
Posted: Wednesday, September 24, 2014 - 02:25 AM UTC
Just a wiping down with iso alcohol to remove finger oils and grease is usually enough.
AlexB1969
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Alabama, United States
Joined: July 12, 2013
KitMaker: 205 posts
Armorama: 120 posts
Posted: Wednesday, September 24, 2014 - 04:40 AM UTC
Hi Joe.

It is indeed the 3 footer I am building. It takes up some space yet it has been fun. I have some plastic tubs that I soak parts in isopropyl with. I am leaning towards the rub down with alcohol and using a good primer. Du to a convenient mistake, I have decided to build the U-333 after its showdown with the HMS Crocus.

Everyone have the best day ever. Be well. Alex
emalewitz
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Texas, United States
Joined: January 13, 2005
KitMaker: 7 posts
Armorama: 4 posts
Posted: Wednesday, September 24, 2014 - 08:17 AM UTC
I ALWAYS wash the plastic before I do anything, then wash the sub-assemblies before painting. I use windex or formula 409 or similar grease cutters. Plastic kits are covered in mold release lubricant as they come out of the box, so must be washed well.

Just spray with your favorite surface cleaner, rise well and all should be OK.