How to avoid overspray? Options

[doug_b_928]

I'm sorry if this is a silly question/topic. I'm still in the researching stage for my restoration. I was at the local autobody supply store yesterday and was asking them about spraying epoxy primer with a gun vs. using etching primer in a rattle can. I don't have a gun and have never used one. I know Jeff Hail's thread says to spray epoxy primer after each area is repaired. They said that either way (i.e., even with a rattle can) there is an issue with overspray. I don't have a dedicated shop and there is literally no place at my house where I would want overspray. They told me a story about overspray going hundreds of feet. So, I was thinking that what I could do is have a tarp on the concrete under the car (plan is to make a bench a la Hail) and drape a poly tarp over the car. I can't tape poly to the ceiling to make a pseudo paint booth because the garage door would hit it when it's open. I suppose I could make a makeshift poly tent that fits under the garage door. But, I would think that lack of ventilation would be a big problem. Would this work? Be too unsafe? Better to rent a workspace and do all the metal work/priming elsewhere? Your thoughts and experiences would be helpful.