For the slight cracks that have appeared in my leather due to age, would this suffice:

http://www.dynamixdyes.com/flexifill-flexible-leather-filler-65-p.asp

Thinking getting that along with alcohol and the kit. That should be enough to do my seats?

Also my drivers side bottom bolster is a bit squashed, will the sponge from any e36 sport seat do?

Might be a xmas project for myself and the dark nights