Polly "S" makes a product called plastic prep #546007 it's a pre-painting cleaning agent for plastic surfaces you use it after the soap and water wash to remove any remaining mold release,Silicone or grease & oils still in crevices and again allow to air dry before painting. 1. Since plastic is soft, you can do the sanding by hand. Lightly sand all surfaces to be painted with 180- to 220-grit sandpaper. The paint should adhere better to the model. Wet-and-dry paper – as the name suggests, this product is ideal for both wet and dry work, and is great for the fine shaping of plastic and wood. Paints must always be stirred before use to allow the contents to mix with each other. Sand Glossy Surfaces . Cautions? I didn t do this for engine plastics and it seemed to be fine. Emery paper and cloth – particularly suited to flat surfaces, this is typically used for polishing metals, with its strength and versatility ideal for smoothing tightly curved metal. However, if you intend to weather the kit, you can got resuts with a standard paint brush. To make things easy, we’ve created this handy abrasives guide to help you master your scale model projects! Note: keep the sanding block when sanding to the edge of your surface to avoid rounding off the sharp edges. This article will provide general advice about the order to apply the various layers of paint and other finishing layers that are commonly used. Some do, and some don't. The painting of a glossy finish such as used on automotive … Decant Tamiya TS color into your airbrush and spray 2 mist and 2 wet coats. As there is no grain on plastic models, you are free to sand them in any direction you choose. This will bring us to the next step which is polishing the paint. Then depending on the type paint your using you may want to use "Barrier" if your using oil base enamel. Problems? Any dust, debris, or sticky materials glued to the surface of your plastic should be removed prior to spray painting. To this end, stir the paint firmly with a toothpick, a plastic stick or a small wooden spatula for approximately one minute. Paint adheres far better to rougher matte surface plastics than to glossy plastics. I was always taught to put the model together and paint it last then decal and weather. Mix the water and soap together before submerging your model. When painting, ensure that you keep the edge of the tin clean with a cloth so that the lid will close firmly later. MAKE SURE this the water has dried off, before you think about applying paint. Vinegar? If your brushing the technique may be different. When prepping a wall for painting we generally recommend a softer sandpaper to avoid damaging the wall. Since most plastic is glossy, sanding is then an essential step. Traditionally, gesso is used on canvas an undercoat before painting (with oils or acrylics), or on stone or ceramic sculptures. It applies to models that have a realistic non-gloss finish including military vehicles, aircraft, ships and some science fiction subjects. ›, How do you prepare the plastic model for painting, How to Athearn Genesis Tune Up and Decoder Buddy install, How to configure servo turnouts with DCC++, The Fidalgo Island RR #12 – Benchwork and Room Prep Final Steps, They can't all be Super Models... Sals Tacos Final, The Fidalgo Island RR #11 – Installing the Lights – The Final Solution, Saturday Solo Ops Session - The Haddam Local. If you must sand, use wet/dry sandpaper and wet sand as dust is harmful. As with other key products such as glue and paint, different abrasives suit different materials and situations. Silicon carbide is available in very coarse grades, and is commonly used for wet applications. My concern is not so much with solid structures like buildings, but with fragile structures like bridges and towers:  anything that is more truss than solid surface. I cannot imagine why you would want to use vinegar, but I would not recommend it unless you're tried it on a sacrificial model and found it safe. If you are working with balsa or another open-grain wood, we advise brushing on a sealant to fill the grain first. You can sand right through the paint in these areas easily! Please let us know in the comments or on our social media channels, and make sure you check out our other guide blogs or our ModelSpace Forum for more handy scale model advice! The more surface area there is, the more places the paint can bond to the plastic. The grading is defined by the size of the particles on the backing material (usually paper or cloth). Once the wood has dried again, sand it with your finest abrasive. Focus specifically on shiny areas, which are often the smoothest and may have difficulty accepting paint. When water is added, it offers an even finer finish. The first thing you need to do is to prepare your model. When smoothing a piece of wood, always sand with the grain instead of across to avoid making scratches – these may not be visible immediately, but might appear once you have added paint. Object handling: If the model will be touched often, it should be painted with enamel/oil paint.Acrylic paint will need special sealers to allow for repeated handling. This may require some small gaps that need to be filled or a scratch that will need to be sanded away. Paint polish is the next secret to that near perfect paint finish for your contest winning model. If there are rougher patches on the wall use an 80 grit but generally, a 100 is enough for preparing a wall before painting. It’s easy, and it’s cheap, but that doesn’t make it any less tedious. Use wet-and-dry paper with water when using this method for plastic parts. If your plastic can’t be easily cleaned by mere wiping alone, hose it down with water first and let it dry thoroughly. The following photo sequence shows the painting of a 1/24 Porsche Carrera model car body, using lacquer paints from spray cans. At the end of this paint sanding sequence the surface of your model should be very even and smooth. Plastic Prep does a good job of lifting oils and mold release off of plastics and is reusable; you can run it through a coffee filter to keep it fairly clean. The instructions said to clear the parts in white vinegar. Two thoughts. Before you paint your model, clean it to ensure that dust particles or contaminants don’t get sealed into your paint job. When smoothing a piece of wood, always sand with the grain instead of across to avoid making scratches. 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