I use a cheap Amazon airbrush to spray Resolene, I cut it 1:1 also, the only problem I’ve had is subsequent coats need to be very light or any low spots tend to pool and dry that way, I’ve used just the air to try and even it out before it drys but it still leaves a spot. Because I live in California, we can not buy any thing but water based, acrylic dyes and if you apply too heavy, the dye will lift. I watched my neighbor smoke a legal joint and I’m considering getting some illegal dye!?!