I need help priming some parts....

Can anyone give me a setp by step on priming my fiberglass bumper and then priming my metal fenders. I have a very good idea on how to do it but I just wanna make sure. I do not own a spray gun so I am gonna use primer in a can. I am only looking to get my parts the same color for now so it doesnt look really strange going to the paint shop plus I wanna take the time to do the prep work. Thanks

sand completely down to the metal on the fenders and smooth out completely. spray on primer, wet sand with soapy water, spray primer, wet sand, spary primer and keep doing that until you dont want to anymore. two coats of primer will be plenty. be sure to completely clean off all the dust and dirt in between sparying.