- Just a second: What code number was the Tamiya Spray you used? TS, AS or MS are normally used on model kits (Polystyrene and ABS plastic), while PS are used on RC bodies (Polycarbonate). I know that using PS sprays on plastic model kits is a good way to turn them into colorful melted candles.Sadly I saw that too, prior to spraying my tires, but was rather confident it wouldn't happen because the paint was labeled "Suitable for plastics and metal" :knock I guess it pays to be more cautious and patient.