how do i unseize
 

ok have been into the back of the shed and found two nitro's 1 kyosho and 1 hoboa they belonged to my son. have been left about a year with small amount of fuel in and have seized up.
whats the best way to un -seize them and is it worth it

Have you tried GT85 (dont use WD40) that may do it.

mmmmm!!! too late
already blasted wd40 down it lol
but both now unseized just got to get some fuel new glow plug and the thing that gets glow plug hot

Sorry but the chances are that they have rusted the bearings and that is why they have seized up.
If this is the case then new bearings would be the order of the day and clean out the internals of the motors.