It works great either brushed on or sprayed on and does not harm enamels or acrylics. Some people prefer to brush it on and others prefer to spray it, the choice is yours. It will smooth out and self-level itself and not leave brush marks if you just let it sit and dry after brushing it on.
Swanny has written the definitive article on it here at this link if you would like to learn more about it:
http://www.swannysmodels.com/TheCompleteFuture.html
Mike
“Wisdom is the right use of knowledge. To know is not
to be wise. Many men know a great deal, and are all the greater fools
for it. There is no fool so great a fool as a knowing fool. But to know
how to use knowledge is to have wisdom. " Charles Spurgeon