I don't have a lot of experience with cleaning cartos, but started using some SR and dual coil LR recently and like them. Even compared to dripping.
Anyway. I do have experience with compressors. Working in automotive refinish.
We use dryers on our compressors to make sure there is no air in the lines. Yeah. If you have a huge
tank on the unit, you're bound to get some water in the bottom. But I doubt anyone cleaning cartos with a $100 compressor is going to have a 50gal
tank nearby.
I don't think I'll be blasting my cartos at work. But I like the idea.
As far as 'oil' in the lines. Negative. If you have oil in your line, that's a bad compressor. So don't buy used. If you see anything dripping out of your line, it's water. Condensed from the air that's moving through the compress-er. Water in air liquifies when compressed. That's why we use the dryers in the paint booth lines.
Again. I don't think the air is the danger. Lol. Just using high psi air in a tiny thing. So regulate people.
And if you do get oil. Return your unit for a refund. Cause it has a bad diaphragm or seal somewhere.