I would imagine that if you do a couple light coats of the lacquer, allowing them to dry to the touch (just a few minutes), before going a bit heavier, to get a good gloss...there shouldn't be a problem laying the lacquer over acrylics (I use enamels, with gloss lacquer). Don't quote me on that though! I have zero experience with acrylics.
Once the lacquer is cured, you shouldn't have an issue using acrylic washes.
Personally, after my enamel paints...I use Minwax clear gloss lacquer (you can get a whole quart for what a couple ounces costs for "special" hobby lacquers), thinned with generic lacquer thinner(50/50). For washes, I use cheap craft paint, water and a couple drops of dish soap. I brush some on, rub it in good with a finger, then use a damp, soft cloth (old t-shirt) to wipe away the excess.