Retopology for Hard Surface?

[Glitch Gremlin]

Hey Guys, im still pretty new to how 3D works "well, for Video games" i mainly do 3D Printing, so my question is.. what is a really good Workflow for Hard Surface with 3D Coat? 

like, are there any Tutorials on how to Retopo hard surface things you guys could link me? i can't seem to find any to be perfectly honest but Google isn't what it used to be. 

Also while im at it: when i try to do Retopo on a square or something flat, the Vert will "Snap" past the ledge of the Square lets say for instance, and it'll be on the bottom of the Square. is there a way to stop that? so i can get the Vert to the exact edge of the Square "or whatever it is" without it snapping past into open space and then to the other side of the model? 

thank you for answering any questions you can by the way. i know you don't gotta and your time is important, but anyone who can help me on my 3D Journey will be greatly appreciated 

[Oleg Shapov]

11 hours ago, Glitch Gremlin said:

the Vert will "Snap"

Hello! Sometimes enabling this feature gets in the way.

[Glitch Gremlin]

1 hour ago, Oleg_Shapo said:

Hello! Sometimes enabling this feature gets in the way.

Ok! ill try it and let you know if it solved my problem or not. hopefully this is what i was looking for. also i noticed changing the setting to "Snap to Nearest" seems to work quite well too. it doesn't Snap to the other vert thats in the same Axis anymore when i change it to that. i figured id mention that for anyone else who might be having this problem in the future like me

[marsmotion]

400 plus tutorials in this playlist ive been compiling

hard surf retopo