Brushing enamel can turn out great. In high traffic areas there is no substitute for a gloss, oil finish. There are no products on the market that are water based that are as durable as the oil finish. It is also easier to brush than the water based products because they stay open longer (dry slower). Generally speaking, the longer a product stays open, the fewer brush marks you will see. To achieve a professional finish there are a few additives that we use to reduce brush marks. It is also a requirement that the applicator have experience. We did this Trolley care in downtown Minneapolis for The Old Spaghetti Factory. Hundreds of people go there daily to eat their delicious food and bang into, sit on, accidentally kick and spill on the booths in this trolley car. I received a durable finish with a professional look.