Oil paintings are so forgiving and resilient or there’s absolutely no way I’d be able to hang out with them. (Lol).
But really:
Painting got dusty? —wipe with a dry, soft cloth.
Goo was flung onto it? —wipe gently with a warm, wet, soft cloth.
Goo more tenacious than that? —use a bit of diluted dish soap with same wet cloth. Wipe clean with fresh wet cloth.
Canvas got dented or baggy?– because someone leaned into it or it was stacked poorly with bigger/smaller/heavier things? —just mist water onto the back of the canvas, and let dry. It’ll tighten up on its own.
Something has STABBED THROUGH your painting—yeeeeaaahhh…you’re probably going to have to bring or send it back here to me. I’ll have to have a look to know what surgery can fix it. I can fix it for a fee.
*I’ve never repaired a painting on board that has been splintered. I’m not saying I wouldn’t try!—I’m just sayin’—no promises.
STORING YOUR PAINTINGS:
Always slot paintings upright in two’s of similar sizes where possible—> face to face, and back to back, assuring that none are poking into the others. Corrugated plastic sheets (coroplas) can be purchased to go between odd sizes.