Hello !! I'm doing a car cake and im a little unsure on how to elevate the car so i can put wheels on. I seen some tutorials I found online but I'm still a little confused.. I understand that i need to put 3 or 4 foam core smaller than my cake to elevate it but i still do need a cardboard under my cake to hold it up. now im nervous that the board under the cake might show.. how can i achieve this. Hope someone who has experience can help me out.. thank you all in advance !!

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Cardboard may show. You have to trim it in such a way that it does not show before placing on form or whatever you will be using. Place on something with smaller surface area for ease of trimming. HTH.