Problem is in sewing machine, but relates to ANY MOTOR :)

Someone has done a wild repair in this sewing machine, looks like they've used epoxy resin to fix a small crack, then just spread the rest around for fun.

I don't know anything about resin, and only a bit about motors. I have 2 questions please:

1) The resin is blocking about 1/4 of the ventilation holes for the motor. Will this affect the motor's ability to cool down?

2) Is this amount of resin in general bad for the motor? Is it affected by heat?

Thanks for any help :)