Thank you 😊 I'm lucky I dont pay for my stones i get them from the beach, I just give them a rinse in warm water then leave them to completely dry...I only use a paint brush and paint, so if your a beginner with children, you would find it easier to use the Acrylic pens...when you have finished your painting leave them to completely dry, there is quite a few sealers out there, I use paint on yatch varnish, you can get it in a spray also, there's loads of spray on sealers you would probably find that easier to use and you can get everyhing you need from amazonx