Alright. As part of my New Year's resolution, I decided to start building my own Necron army. For that I wanted to know:
What do I need to start a minimal size army, like 500 points? A Necron Overlord, two Necron Warrior troops, one Necron Immortal troop, and one Tomb Blade squad, correct?
I already have a color-scheme in mind, blue, white, and silver, atypical as that might be for the necrons.
EDIT: Also, what else is required to start painting?
I'm not familiar with necron point costs, but as for unit composition, the "two troops and an HQ" rule is a rule of thumb, not a rule of...ruleness. In 8th and 9th edition, army composition is governed by detachments, the smallest of which, the patrol detachment, requires one HQ and one troop.
For painting materials all you need is paints, brushes, and some sort of palette. I'd suggest adding in a GW painting handle and some brush cleaner instead of using just water. I'd also suggest you get something, anything non-GW to practice with, GW models are expensive enough you don't want to waste them as a test model (unless your local store has a pile of the easy build practice models they released with the launch of contrast paint, some stores have piles of them that they give out for free).
For painting knowledge, there's a couple things (as I've said before, you should ask people at whatever store you're playing at, in my experience they're generally happy to help new people learn).
1. Get the Citadel Paint app, it's an amazingly helpful tool to help you pick color schemes and create the look you're looking for.
2. The first step in painting is priming. This is to give the paint something to 'stick' to. There are three colors of primer most paints use, white, grey, and black. The color of the primer will influence the look of the base paint of the model, with grey being the most neutral and white or black lightening/darkening the base layer. Experiment with different combinations to find the look you want. You don't need fancy primer for this, the normal stuff you get at Walmart will typically be fine (though the consistency can vary between cans for some reason. I had a whole can of black that came out much more matte than it was supposed to one time, which was annoying). I've found a flat primer to be more useful than gloss or matte. Most other steps can be skipped or only applied in certain areas for certain effects, but every model will always need a coat of primer.
Be very careful when priming a lot of models at once, I once ruined a bunch of models because the overspray from the one I was priming drifted over onto the ones I'd already done, and it built up a big, thick, bumpy layer. I'm still working on stripping the excess primer.
3. There are two kinds of paints, acrylic and enamel. Citadel and similar wargame paints are acrylic, while more traditional model paints like testors are enamel. They're generally interchangeable, with a few key differences.
Acrylic paints are generally a bit easier to control because you can water them down (in fact, you pretty much need to do so), but can take a few coats to build up the color properly. This is where the 40k "THIN YOUR PAINTS" and "Two Thin Coats" memes come from. You can also mix them together to create different colors and certain effects (eyes and power weapons being two of the more well known examples).
Enamel is a bit trickery to work with in general (it's effectively impossible to thin down, and has a bad habit of separating so you have to shake and mix it up again every time you use it), but gets a much better color in one coat, and doesn't show brush strokes the way that acrylic is prone to doing. I've also found it's better for dry brushing and some metallic colors (silver being one of them). It's also very hard on brushes.
There's also GW's new contrast line, which is billed as a one and done paint and wash assembly (more on that later), which is correct. It's very useful for painting large parts of a model all at once, or certain niche applications (I use contrast to make a quick and easy glow effect on plasma weapons), but it's not very good at repairing mistakes if you're painting with other types of paint over top if it and spill paint onto the contrast coated area (which you will do), you have to cover the area in regular paint and then a second coat of contrast.
There's also washes, which are often applied as a or semi final step in painting an area. A wash is a very, very thin layer of paint that sinks into recessed areas of the model to create depth, and also shifts the color of a surface layer a bit. Nuln Oil is a general purpose wash sold by GW that's useful in nearly every application.
4. There are four main painting techinques. The normal, dip-brush-into-paint-and-drag-arcoss-model way, which is self explanatory. There's also dry brushing, which is where you dip a brush in paint, wipe most of the paint off, and then brush it over the model. This creates incomplete coverage, which is useful for a number of purposes. I use it to create a burnished/worn metallic look. It'll take a bit of time to get used to doing this correctly.
After that, there's something called highlighting, which is painting thin lines on the edges of a model in a lighter shade than the rest of it. Traditionally it's used to create the impression of light striking the area and make it look more real. Highlighting is almost always the very last step of painting, washing highlights is often self-defeating. The most complicated method of doing this involves lots of careful planning and positioning so that it looks like the light is striking the model from a particular direction or angle, but a more common method is to just highlight everything (or nearly everything), which has the effect of really bringing out the detail in the model (this is called the 'Eavy Metal style, after GW's internal painting studio which uses this method).
And then there's airbrushing. I don't know how to do that, but it might be worth looking into. It's great at blending colors and creating a very clean, even layer.
5. Certain colors are difficult to paint. Black and white are two of them, because you generally won't want to actually have an area be black or white because then you can't shade or highlight it it, you've already made it as dark/bright as possible, there's no way to create contrast. The typical method is to instead use a very dark/light shade of grey, and then use even more extreme shades of grey to shade most of the area, with black and white only being used in small qualities in the darkest, lightest areas. I don't care to do this most of the time, but have a tip for black. Just use a layer of normal black paint, and then wash with drakenof nightshade, this will create a more shadowly, inky black look (will attach photo later).
6. After painting, there's also varnish/clearcoat/hardcoat (for reasons unknown, different branches of the hobby refer to it by different names). Whatever you call it, it's the process of spraying or painting a hard, clear coat of stuff over the model to protect the final paint job. This can also change the final look of the model depending on how you do it. This isn't mandatory, unless you use metal models, in which case it's absolutely required to prevent the paint from chipping. However, it can also be environmentally sensitive, never clear coat when it's humid out or the model will come up looking frosted.
Let's look at some of my models and how I paint them, for an example of this works in practice.
This is one of my battletech models, custom built.
1. Black primer
2. Paint kantor blue over most of model.
3. Paint cockpit panels lothern blue.
4. Wash entire model in drakenhof nightshade.
5. paint untouched areas with several layers of fireslayer orange, needs several extra layers to build up the color because of the black base. Edit: nowadays I use a base layer of jokareo orange with fireplace on top. Sane finally look, much faster, far fewer layers.
6. paint gun barrels and other small details skavenblight dirge.
7. paint muzzles and other details with leadblecher.
8. touch up.
9. Finally, apply a layer of gloss clearcoat, followed by a layer of matte clearcoat after the glass has dried (or maybe it's the other way round, I have to write that down because I can never keep it straight. This protects the base paint, brightens it up a bit, and makes it look smooth and sleak without being too shiny. It's also sort of a way to highlight the model without actually highlighting it. I hate highlighting.
This takes about 3 days to do, counting the time spent.
That was the easy one.
This a primaris space marine devastator. I made him before all marines got 2 wounds, so I'm claiming credit for the idea of a 2 wound devastator and no one can stop me. It's a long process.
1. Black primer.
2. Base layer of Caliban green.
3. drybrush a layer of testor steel enamel.
4. paint shoulders, back of power pack, and other assorted bits with retributor armor.
Paint edge of pads, kneepads, cables, belt, chestplate, joints, and insignia black.
5. paint main body of gun in skavenbright dirge.
6. paint barrel, rear, and ammo feed silver.
7. paint lothern blue on vistor.
8. paint edge of visor with thin line of kantor blue.
9. Paint any pounches with knight questor flesh.
10. Apply single coat of caliban green to top of backpack, thigh pads, and the raised elements of helmet.
11. Apply layer of dark angel green over the caliban green.
12. paint the sensor on the helmet red.
13. touch up all the mistakes. There's always a load.
15. Wash the entire model with a coat of nuln oil.
Painting a squad of marines like this takes up to a week, depending on how complicated the model is and how large the squad is.
Regarding the problem of painting white, this is what happens with you just use a single layer of white without shading (and also with some sorta dodgy lighting. Photography is not my strong suit):
I spent several days trying to get more traditionally techniques to work, and it just didn't, either because I didn't like the final effect, or it required too many layers and got too thick and started ruining the detail. So I gave up and just started using very watered down white and slowly building up the color.
For your specific army necrons are famously easy to paint, with most models needing little more than a drybrush, a wash, and some detail on the eyes and other bits. Of course, that was with the old style green plastic tube necrons, the new ones probably require a bit more work.