I usually start with a simple kinetic model – the Arrhenius‑based rate law: dα/dt = k₀ exp(–Ea/RT) (1–α)ⁿ where α is the conversion (0 to 1), k₀ is the pre‑exponential factor, Ea the activation energy, R the gas constant, T the temperature, and n a reaction order. I fit k₀, Ea, and n to a few small cure‑runs with a nonlinear least‑squares routine, then integrate to get α(t). If the resin is stubborn, I throw in a small empirical correction term for moisture or filler content, but I never make the equation too elegant – perfectionism is a curse. You can plug the fitted curve into a simple loop in Python, print the predicted solidification time, and compare it to your actual cure. If it still drags, just blame the resin for being dramatic.