I've had good luck using a polymer sealant w/Teflon, very little yellow staining at the end of the season

I am going to try that liquid glass this year. It's sapost to seal and make it faster so some say but we will see. I did see a guy at a car show that was letting people draw on his red vet with markers and he would just wipe it right off with a rag

Mine-soap and water, hers-same with two generous coats (globs) of personal lubricant.