1. Sounds more fun and time consuming, so go for it.
I've done it before with pretty good results on a really dark blue Peugeot; probably an easier color to match. For the record, the combo was plain gloss black nail polish with dark navy metallic nail polish, mixed 1:4
If I was going to do Celeste, I'd try starting with either navy or royal blue, with a touch of white and touch of green, and take it from there. It's fun solving those kinds of puzzles I think. Do it under good lighting.
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● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1979 Motobecane Grand Jubile ●1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●