Generally speaking, painting below 60 degrees is not recommended for several reasons. Paint will have a tendency to run and sag if it can't tack up quickly, time between 2nd and 3rd coats must also be lengthened, to name a few.
Here's some tricks that I've used with success when the temps are low and I need to rattle-can something.
Prep the part that needs paint by sanding with 220 grit paper or scotchbrite, remove dust and then take the part inside where it can warm up. Overnight works well, near a heat vent or by the fireplace.
On raw parts that will fit, I've warmed them in the oven to about 150 degrees, then let them cool a little before shooting primer on them. 2 or 3 coats of Duplicolor metal etching primer (most NAPA , some Autozone carry this in Utah) then scuff and remove dust.
Warm up your paint cans by setting them in the sink in a 4"-6" bowl filled with hot water, then let hot water trickle into the bowl for 10-15 min., occasionally removing the can and shaking it to mix up the paint and distribute the heat evenly. I said warm. Getting a pressurized can HOT will make it explode.......don't want you to have to explain why your face is bleeding and you're now blind, not to mention the fresh metallic silver splatter paint job in the kitchen ..........
Run a wire hanger through the end of the part you need to paint so you can hang it from the garage door track. Haul your warmed parts and paint out into the garage and spray a nice, even coat on them. If multiple coats are needed, haul them back inside and hang them up where it's warm (not near an open flame, fumes are flammable) until the fresh paint is tacky or almost dry to touch (put newpaper under where they are hanging, in case a drip may occur.....keeps wifey happy too) then haul the part back out and spray another coat on.......repeat until you're satisfied with the coverage. Then let the part hang in the gee-rage until dry, or haul back inside to share the smell of curing paint with your family.
Good luck and happy can rattling..........BTW, don't forget to wear your respirator when painting.......10 years of commercial painting talking.
