Spring guns:
lubricate your blaster every 2 months or so and after any major use (find a plastic safe lube here)
Take bungees off the gun when not in use
Remove the spring when not in use (I disagree, I think that you can leave the spring inside the gun)
Check for any damage after every war or every few months
Wipe your blaster down with a damp paper towel to remove dust.
Don't dry fire at all.
Airguns:
Lubricate the moving parts every 2 months of so of after any major use (find a safe lube here)
Keep one pump of air inside the blaster when not in use (this helps keep the o-ring lubricated and keeps dirt from getting inside the internals)
Replace tubing after a year or so. (Some people say its not necessary, but I've had an experience where the tubing on a 3k blew after I hadn't used it for a year)
Check any connections under water for leaks after any major use or every 6 months.
Check any previous patches or repairs every 6 months.
Wipe your blaster down with a damp paper towel to remove dust.
Painted blasters:
Touch up any scratches or marks in the paint after any few months.
Keep a protective clear coat over the paint.
Avoid setting on hard objects.
Avoid leaving it in the sun.
Avoid spilling chemicals such as paint thinner, acetone, fingernail polish remover, or other solvents on the paint.
I will happily update this if anyone has any suggestions.
Edited by nerfer9, 06 January 2010 - 10:09 PM.