Paint flaking off between painting sessions
#1
Posted 02 March 2012 - 10:44 PM
#2
Posted 02 March 2012 - 10:53 PM
Also, while some people say it isn't necessary, another thing you can try is washing the metal figure with a toothbrush and dish soap and then letting it dry before you prime it. The moulds the minis are cast with are dusted with powder to help them release from the mould, and while you're filing off mould lines or converting a figure you are getting your skin oils on it. Both could make the primer not adhere completely.
Which brand of paint are you using? I'm told Vallejo model paints are a bit more delicate and subject to rubbing off while painting.
Do you mount your mini on a holder while you paint? This helps you minimize how much you handle the mini. While paint is surface dry in seconds, it can take a few hours or a day or two to really set, so minimizing how much you touch the figure while painting can help a lot with this. You can use a pill bottle, bottle cap, wooden spool, dice box, all kinds of things.
Paint from the inside outwards when possible. Sharp edged items and parts that are on the outer edges like hair get handled more while you're painting, so are more likely to rub off. So if you do those parts last, you can touch up rubbed off primer with a brush on primer and then paint them up trying to touch them as little as possible.
People have used dullcote to set an area of paint and then paint over it it some more, particularly for tricky stuff like freehand designs, so that could be something to try. For me, it didn't work ideally if I didn't have all the areas of the mini at least base coated. (What I mean is, if I dullcoted and there was some bare primer, the paint didn't seem to stick as well when I painted over the primer/dullcote sections.)
#3
Posted 02 March 2012 - 11:12 PM
That's a great idea, about painting outwards, I think I learned that, but I get carried away and just go with whatever. I'll try to get more disciplined about it.
I'm thinking the dullcote might be a last ditch effort.
I wonder if I'm overpriming, too. I've been using brush on primers, black or white, and normally I do two coats.
I really appreciate the fast reply, and all the information! I paint a lot, I'm not new to it, just a long time lurker, I've learned most everything I know about painting from these boards, thank you so much.
#4
Posted 03 March 2012 - 09:28 AM
#5
Posted 03 March 2012 - 10:35 AM
@monkeysloth
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#6
Posted 03 March 2012 - 10:54 AM
#7
Posted 03 March 2012 - 03:04 PM
Ishil
#8
Posted 03 March 2012 - 06:46 PM
I do think that brush-on primer is not quite as sturdy as spray primer. Probably due to chemical make-up or some such, since it's also more toxic than brush-on. Brush-on is very handy for those of us in humid places, or to touch up little rubbed off places or chips, but I guess slightly reduced strength is the price.
I think all types of primer get a little stronger if you give them a day or three to cure before handling the mini.
Sounds like using a holder will help with a couple of problems. That's a good idea to keep extra parts in a pill bottle holder!
#9
Posted 04 March 2012 - 01:20 AM
I do think that brush-on primer is not quite as sturdy as spray primer. Probably due to chemical make-up or some such, since it's also more toxic than brush-on. Brush-on is very handy for those of us in humid places, or to touch up little rubbed off places or chips, but I guess slightly reduced strength is the price.
I think all types of primer get a little stronger if you give them a day or three to cure before handling the mini.
Spray-primers usually have some kind of etching agent and are made of stronger paints, like enamel. Most brush-ons have to be acrylic-based, to avoid toxicity. Sort of like thinning down gesso and priming with it. Hence, not quite as sturdy as a spray enamel or lacquer-based primer.
Your idea of letting the primer cure is a good one - one thing I always do after spray primering is dry the mini for a minute with a hot hairdryer. Speeds up the "setting" time and cooks off a lot of the volatiles from the spray itself. Of course it helps to have a garage to do this in - no paint fumes evaporating in the house! But I do find it makes the primer a little harder.
Back to the original issue, though - besides a handle (which is a must IMHO), there's a few other things that can be done to limit paint rubbing off. One thing is to acid-etch the mini. I pop it in a baby-food jar of household vinegar for 1 minute or so. The mini comes out looking slightly dull. I wash it to totally neutralize the acid. The mini gets a micro-etch over the surface that promotes adherence of primer and can cut down on rubbed off paint.
Another idea is to use a glass-medium as brush-on primer. The standard used to be Folk-Art Glass and Tile Medium. It's a medium meant to let crafters paint acrylics on glass. As such it sticks really well and resists rubbing off. The down-side is it's clear, but you can use it as a base primer under the white paint-on, or mix a little white paint with it.
#10
Posted 04 March 2012 - 03:57 PM
I usually sticky tack mine onto a pill bottle, or hold the base, if it's big enough. Others use a wine bottle cork, or a block of wood. Whatever you have that you can easily grip will work.
Good luck!

Proud Member of WAMP
#11
Posted 05 March 2012 - 09:49 AM
#12
Posted 09 March 2012 - 09:52 PM
@monkeysloth
---My Tutorials---
New: Sculpting and Painting Rocks | My Tutorial List and WIP Thread
I never thought I'd write this...but I agree with MonkeySloth on this one. ~ Adrift
#13
Posted 09 March 2012 - 09:59 PM
#14
Posted 10 March 2012 - 12:26 PM
@monkeysloth
---My Tutorials---
New: Sculpting and Painting Rocks | My Tutorial List and WIP Thread
I never thought I'd write this...but I agree with MonkeySloth on this one. ~ Adrift
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