Hi I did my training with marvel lash in may and after months of trying I'm not happy with the glue it just does not last!!! So yesterday I ordered the sample pack with flirties!! Just wanted to know if it was essential to use primer and sealant with flirties? as we did not use them with marvel lash!! I also wanted to know what the difference is with the flirties lashes I.e. b,c any d curl etc as when I trained with marvel lash the didn't really explain the difference between lashes!! Sorry if I have just asked questions that have been asked a thousand times on here but I couldn't find them lol xx