Be very, very careful...I'm hunting wabbits. No seriously, 78's were almost all made of shellac, so no alcohol. My 78's are getting seriously fragile as they age too. You can use 100% pure glycerin on the records as you transcribe them to cut surface noise, but they'll need to be washed again, but I've found it worth the extra effort. If you have "soft" water, old P&G real bar soap is very gentle. A soft toothbrush can be used to clean an amazing amount of "gunk" out of the grooves. You'll probably want to find the largest stylus available. I use a 3 mil diamond(looks like an ear-ring) conical.