rashid111 wrote:
Assuming one has a fairly straight approx 4.5" OD x 10" long round
motor with smooth surface, what would be a good way to get some heat
sink type of deal ?

I am thinking about

A) getting say 3/8 or 1/2 alum channel, cutting it into pieces the
length of the motor and attaching the "strips" flat bottom toward the
motor around the circumference. 3-4 zip-ties holding the Us against
the motor

If cable ties are good enough for this project, how about using a small
fan for cooling?

A stainless steel hose clamp won't get brittle and fall off like cable
ties.