Painting - How to paint a Piano?

I have a small upright piano (not an antique, got it second-hand), which I am considering painting. The current finish is the usual: dark brown stain and varnish (gloss but now a bit dull). I'd like to paint it white (mainly to make the dark room lighter). I can't move it outside and I can't generate fumes (due to newborn), and I have space/time constraints; therefore, although I suspect an oil-based primer and paint would be best, I am leaning towards a water-borne primer and water-borne paint, both 100% acrylic. I have a Benjamin Moore store nearby and would strongly prefer to use BM products (e.g. 100% acrylic primer, or if needed, prime with alkyd-based undercoater, and then water-borne Satin Impervo). However, I am open to buy another brand if needed.

My plan so far: Sand with 220, prime with BM All-purpose 100% acrylic primer (with some later XIM X-tender, sand with 220, first coat of BM water-borne Satin Impervo (with some latex XIM X-tender), sand with 220, second coat of Impervo. If necessary, I can use the alkyd undercoater, but would prefer not to. I'll use a top-quality synthetic brush (brand?). Due to space constraints, I cannot spray.

This link recommends Fine Paints of Europe Eco line. Is that reasonable?:
http://hometeamtotherescue.homemag.com/blog/2007/02/painting_the_pi.html

Any advice will be welcome. Thanks.

I wouldn't consider not using a solvent based primer - don't forget to sand and removing sanding dust first. I'd use 150-180 grit on the original finish and then use 220 on the primer.

I use mostly SWP but BM also makes good coatings. I agree that a waterborne enamel would be a good choice for the finish. I'm not familiar with europe eco coatings.

Sealing off the room and using a fan at the window will do a decent job of removing the paint fumes.