I'm sure it's been covered on here before, but I'll be darned if I could find it. Since I've got two new fenders that are different colors than my horrendous tank

I need to get busy with updating the paint. I plan to pull both fenders and the tank this weekend and would like to get as much done as possible to remove the old paint & possibly prime and/or paint the tins.
1. What have you guys found to be the quickest, most effective way to remove the old paint?
2. Is there a step by step guide to get the best possible finish from using rattle cans to come up with a decent/nice finished product?
3. Are there any surprises that I should be on the lookout for?
Anyway, thanks in advance for any advice you can give me, and wish me luck. I will be checking this between now and Friday for suggestions.