How to Use AK Interactive Gen-3 Paints for Scale Model Weathering

Quick Answer

AK Interactive Gen-3 paints are water-based acrylics designed for brush and airbrush, offering fast drying and easy cleanup. For scale model weathering, you can use them for pin washes, filters, and dry brushing, but remember to seal each step with a clear coat to protect your work.

Weathering transforms a clean plastic kit into a realistic, battle-worn model. AK Interactive's Gen-3 paint line gives you a versatile range of acrylic colors that work well for brush painting and airbrushing. Whether you're adding grime to a Gundam or rust to a tank, these paints offer predictable results.

This guide focuses on practical techniques using Gen-3 paints. We'll cover surface prep, washes, filters, and dry brushing, plus common mistakes to avoid. You'll also see how specific AK products—like weathering pencils and enamel textures—can complement your paintwork.

Why Choose Acrylic Weathering Paints

Acrylic paints are popular for weathering because they dry fast, clean up with water, and are less toxic than enamels or lacquers. AK Interactive Gen-3 paints are formulated for both brush and airbrush, so you can switch techniques without changing your paint set. Their fast-drying nature means you can build up layers quickly, but it also means you need to work efficiently to avoid brush marks.

One key advantage is the ability to reactivate acrylics with water or a dedicated thinner. This lets you soften edges and blend transitions, which is essential for realistic filters and shading. However, because they dry quickly, you must plan your steps and keep a wet palette handy if you're blending large areas.

• Always shake your paint bottles thoroughly before use to ensure pigment is evenly mixed.
• Use a dedicated acrylic thinner instead of plain water to maintain the paint's original performance.

Surface Preparation and Priming

Before you start weathering, your model needs a clean, primed surface. Wash the plastic parts in warm soapy water to remove mold release agents, then rinse and let dry. Apply a primer—either from a rattle can or airbrush—to give the paint something to grip. Acrylic paints adhere well to a matte primer, which also helps with subsequent weathering layers.

If you're painting over an existing glossy coat, scuff it lightly with fine sandpaper or use a matte clear coat to create a tooth for the paint. A smooth, glossy surface will cause the paint to bead up, making washes and filters harder to control.

• Check your primer is fully cured before starting; tacky primer will ruin your paintwork.

Using Washes for Panel Lines and Recesses

Washes are thinned paints that flow into recesses to emphasize panel lines and details. For acrylic washes, thin your Gen-3 paint with a drop of water or acrylic thinner until it has the consistency of skimmed milk. Apply it with a fine brush along panel lines, letting capillary action pull the paint into the groove. Wipe away excess with a damp cotton swab or tissue.

Common mistake: using too much paint or letting it dry before wiping. Work in small sections and clean up quickly. If the wash dries unevenly, you can reactivate it with a little water and gently blend the edges.

• A gloss clear coat before washing makes cleanup easier and prevents the wash from staining the base color.

Applying Filters for Color Modulation

Filters are very thin, translucent layers of paint applied over the whole surface to unify colors and add subtle tonal shifts. Mix your Gen-3 paint with a large amount of thinner (about 10% paint to 90% thinner) and apply a thin coat over the model. This technique works well on large flat panels like those on Gundams or aircraft.

Because acrylics dry fast, you need to work quickly and avoid overlapping strokes that can pull up the previous layer. If you want to remove a filter, you can wipe it off with a damp cloth before it dries, but once dry, it's permanent. Practice on a spare part first to get the right dilution.

• Use a wide, soft brush for filters to minimize streaks.

Dry Brushing for Highlights and Edge Wear

Dry brushing is a technique where you load a brush with a small amount of paint, then wipe most of it off on a paper towel until the brush is almost dry. Then you lightly drag it over raised edges and details to pick out highlights. For chipped paint or worn metal, use a lighter shade of your base color or a metallic paint.

For example, on a Gundam's armor, you can dry brush a light grey or silver along edges that would naturally see wear. The key is to use a brush with stiff bristles and a light touch. Too much paint will leave streaks and cover the surface instead of highlighting it.

• Test the paint consistency on your thumb first; you want a faint dusting, not a wet line.

Step-by-Step Weathering Process

1. Prepare the surface: Clean the model with soapy water, rinse, and dry. Apply a primer and let it cure fully. For best results, use a matte primer to help acrylics adhere. Checkpoint: Primer is dry and smooth to the touch before proceeding.
2. Base coat and clear coat: Apply your base color with an airbrush or brush. Once dry, spray a gloss clear coat to protect the base and provide a smooth surface for washes. Checkpoint: Gloss coat is even and free of orange peel.
3. Apply pin washes: Thin your Gen-3 paint to a milky consistency and apply to panel lines. Let it dry for a few minutes, then wipe away excess with a damp swab. Checkpoint: Lines are crisp with no staining outside the recesses.
4. Add filters and modulation: Mix paint with thinner in a 1:10 ratio and apply a thin coat over the surface to unify colors. Work quickly to avoid streaks. Checkpoint: Surface has a subtle tonal shift without obscuring details.
5. Dry brush for wear: Load a stiff brush with a small amount of lighter paint or metallic, wipe most off, and drag over edges and raised details. Checkpoint: Highlights appear only on edges, not on flat surfaces.
6. Seal with matte clear coat: After all weathering is dry, spray a matte clear coat to seal the work and reduce shine. This protects your paint and gives a realistic finish. Checkpoint: Final coat is even and the model has a uniform sheen.

Products Mentioned in This Guide

• Acrysion N52 - Olive Drab 1 (Semi-Gloss/Aircraft): This is an epoch-making paint that can be used for both brush painting and air brush painting. Drying speed is faster than with the existing water based hobby colors, so work efficiency is improved dramatically. Tap water can be used to dilute the paint, but we recommend use of our dedicated thinner in order to retain 100% of the original paint performance. This military green is a good base color for aircraft or military models, and its fast-drying property speeds up the weathering process.
• AK10010 Watercolor Pencil Sepia: Weathering pencils are water-based pencils with 17cm semi-grease paint specially for use in modeling. Specially formulated with the most suitable basic colors to achieve all the effects in a very simple way. They are very easy to control, clean, and of course they are not toxic. It is an ideal tool both for people who want to introduce themselves in modeling and for more advanced modelers who can discover their... Watercolor pencils are excellent for adding fine streaks, rust lines, and subtle stains. They can be activated with water to create washes or used dry for precise marks.
• AK676 Moss Deposit: Enamel Product. A deposit with a texture, to mix and use with other products, and helping to reproduce an ultra-realistic appearance of moss, lichen, and other green organic growth. The finish is extremely authentic and can be combined with other tones for more realism. For dioramas or vehicles left in damp environments, moss deposits add a realistic organic touch that acrylic paints alone can't achieve. Enamel product can be applied over acrylics once they are fully cured.

Weathering with AK Interactive Gen-3 paints is a rewarding process that adds depth and realism to your models. By following these steps and using the right products, you can achieve professional-looking results. Remember to practice on spare parts and keep your workspace well-ventilated. Happy building!