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.

[doug_b_928]

Yea, I'd have to make it big enough to be able to open the doors. I was thinking that, since I will only do small patches at a time, ventilation may not be a big problem. But, with no air movement it would get stuffy in there. Maybe I could rig it so the poly rolls up on all 4 sides during fitting and welding, then lower the poly for grinding and patch priming. It wouldn't be completely sealed this way, but, if the poly pieces overlap, would probably be sufficient to keep overspray and most of the dust in.