Scale, the Rustoleum Appliance white is a very high solids paint and will cover the red just fine. Lacquer is a poor choice for glow powered models as it will not withstand exposure to glow fuel at all. The cowl has already been prepped for paint at the factory simply doing a scuff and spray will yeild the best results in this case. Primer is great for when you need to fill imperfections and pin holes but there should be none of that in this case.