sami4x4

I am getting my 2001 factory wheels powdercoated flat black and I was wondering about the plastic center caps...I talked to the powdercoater and he said the oven they use is 400 degrees and was unsure if the centercaps would hold up to the heat...According to ford, the center caps are powdercoated, but I need to know if anyone can help me with this. I don't want to have to buy new centercaps because the others melted!

thanks,
Larry