Describe the appearance before choosing products
Decide what the finished model should suggest: a polished road car, an everyday working vehicle, a display aircraft or a deliberately stylised scene. Collect a small set of appropriate reference images for your own study, noting the version and context. These describe your goal, not a shopping list. If you want a fictional colour scheme, mark it as a creative choice rather than historical accuracy. Keeping that distinction clear makes later decisions easier.
Make a short palette
List the large surfaces first and separate them from small details. Record the colours and product references the kit instructions specify if you plan to follow them. Do not assume similarly named colours from different manufacturers are equivalent. Our finish finder suggests a visual direction and questions to test, but it does not select chemically compatible paints. A handful of intended colours is easier to manage than an assortment bought without a particular project in mind.
Check the whole system
Consider the model material, surface preparation, colour coat, decals if used and any final coating as a sequence. Read the instructions for each actual product, including drying or curing requirements and compatible materials. Use only the thinning and cleaning methods the maker specifies. Test the intended sequence on a suitable spare piece before committing to the model; an attractive finish on the wrong test material may tell you little about your actual parts.
Record the result and leave time
Write down what you used, the order and the observations after the specified wait. Keep successful test notes with the build card so you can repeat the process. Avoid scheduling another stage from a universal drying-time rule; conditions and products differ. If a test fails, stop and resolve the cause before adding more layers to the finished model. You do not need an airbrush to define a paint plan, and buying one does not remove the need for product instructions, a suitable workspace or practice. Keep the goal manageable and let a small test answer one question at a time.