I was in Staples today and found a foam knife, exactly for cutting foam core! I’d been using an exacto knife to do that, and it was pretty awful. I didn’t buy this tool (it was $12) I’ll wait until I need to. I’ve had to start using foamcore for cake bases (I don’t have anyone who can cut plywood), gluing it to the cake drums sometimes or using it for the bases of dummy cakes that go on display (a cake drum costs an average of $6, the foam core is much less and for a dummy cake, why not?)
Sometimes you have to use what you have and the foamcore car was a good way to do it. Sometimes I have people who want to do a grooms cake and if their budget doesn’t run to a sculpted cake, I tell them to buy a decent looking toy motorcycle, boat or car, and we make the top of the cake look like a roadway or a dirt track or lake and put the toy in place. I also bought, early in my career, chocolate molds to use. I don’t use them a lot now, but in the beginning, they were a godsend. Especially the boat!