Driveshaft Allignment question

[tim21391]

i just wire wheeled, sanded, and prepped my frame and shot some surface rust converter primer on my frame then shot it with some black undercoating.. i sprayed the top of my driveshaft with the udnercoating... people told me that if i do the whole thing it will throw my driveshaft off since i guess it has to be weighted right....i dont think it really matters does it.... should i be fine if i continue to paint up my drive shaft??