Hi Mark, So far I have used brushes. I tried a foam brush but the dope eats them up. small pieces kept comming off. I switched to a 1 and a half inch art brush and it worked very well. I just got the touch up gun and have not tried it yet. The dope mix is a little thick to spray. Some guys recommend full strength dope but I find it goes on better when thinned about 25 %. I mixed the dope and cornstarch one to one and then thinned to a nice painting consistancy. So far it's working well.