Bernie if you are used to using shellac, you’ll have no problem with lacquer. I started using lacquer years ago when I bought my first HLVP. Since it has a pre-heater on it , I was afraid it would get too hot to use alcohol based finish. With antiques, using shellac causes a problem when they are placed where direct sun light hits them. Shellac tends to soften when it gets warm, plus, lacquer has a little more u-v protection. I can spray when the shop is as low as 40 degrees with out any problem. 
Mahlon
