use plastic gloves , on top of that get a sport sock (i use dp's hehe) and turn it inside out (fluffy side) put it on your skin and rub downwards.. this always works for me i am never streaky! btw i use fake bake what are u planning to use
i dont think st tropez is that dark, if your pale u could try adding some body lotion to it to thin it down. With st tropez it has a funny greenish brown colour to it so u can see where u have put it on so u shouldn't be that streaky. I would advise putting it on about 1 hour before you go to bed (it drys quick) sleep with it on and wash it off in the morning otherwise u will look like a dirty scrubber as it isn't a very nice colour until you have washed it off.
no st tropez lasts ages that is the good thing , yes i have used it but i am now using fake bake . u dnt have to use a lot to get a tan with st tropez but if u want to look golden then u can use a bit more, it never really looks orange. one thing is with st tropez make sure u exfloliate ur knees really well sometimes i had rings round my knees as they were too dry