If you catch it before drying it, hairspray can work. I used it on some of my son's shorts last year. (khaki uniform shorts with blue ball point pen ink all over the leg, and I mean scribbled in ALL over... he was 10... don't ask).
You have to use the aerosol kind of hairspray, and really soak it with the spray... then immediately blot with a soft cloth. Spray more, blot more. Repeat, repeat, repeat. Rinse with plain water in your sink... and spray more hairspray and blot more. Spray and blot. It took awhile and it really was a 'project', but I eventually got most of it out of my son's shorts. I used paper towels for some of it. But a clean cloth actually worked a little better when I switched to that after the bulk of it had come out.
If your husband is just getting a few strokes on his shirts, then it ought to come out okay. Just be sure not to wash until you get it all out.