its alot of work yes,but it sure beats the hell outta paying a body shop 50 bucks an hour or more to do it for ya.i have done quite a few things with a rattle can and once you get the how to down its great,just need to take it in steps and do it the same way everytime.90% of painting is prep,5% skill and the rest is talent.
the probs i see from many people when they try to do it is coverage,smooth even strokes,dont rush ANYTHING! take some time and do it just after u have had dinner or a beer and when your mind is clear and focused.use a tack cloth or air to clean dust off the part after using a cleaner,i like dish soap on plastic parts and a cleaner degreaser on all others.as for sand paper use like a 150 grit to remove paint and work your way down to bare surface.you may be tempted to use a heaver grit but dont,it will just cause you more work it the end work up to a 220 and then 320 finish with around a 600 grit paper,dont realy want to too much finer cause you will lose the "tooth" for the paint to stick to,clean the part,tack rag,primer,let it dry then another sand with 600 grit,tack rag,more primer,inspect your work for flaws,if your okay then top coat,smooth even strokes wait the proper amount of time as per the paint you are using for recoats and finish with some good automotive clear and wetsand down to a 2500 grit and rubbing compound and you will have a perfect finish for a whole lot less
