If they are pre-matted, pre-keyed effects they should work straight away when you bring them into Final Cut Pro.
www.videocopilot.net to have a look at their action film effects.
just use karosyrup with food coloring digital blood effects suck anus
Yeah, I prefer mixing blood on set. But when you have big gunfights, limited time and a small crew - using digital blood and bullet hits makes things a lot easier. If you have After effects, you can work on it and make the blood look pretty decent. I lost my enthusiasm for mixing blood making squibs out of insecticide sprayers. You always need replacement costumes and it gets old after a while when you have a crew of like 3 or 4 people.