Fisheye occurs when there is water in the line or other contaminants on the surface. If you're spraying, buy a line dryer for the spray gun. You can get an inexpensive inline dryer to put just before your spray gun. They're available at most auto paint stores. If it's caused by contaminants on the stock, make sure you sand well enough. I prefer a 600 grit wet paper between coats, especially if I'm doing fine work. Orange peel is caused by spraying with the material too thick. Thin the varnish/laquer before you spray. It needs to be near water consistency. Use several very thin coats and sand lightly between coats.