I have no Illamasqua nail polish let alone the colour Radium, next best thing for me OPI Who The Shrek Are You and the two Born Pretty nail art pens in black & white.
I used Save The Nail Toughen Up Base Coat and applied two coats of OPI Who The Shrek Are You
When I painted the last nail I used Save The Nail 45 Second Coat ( side note - amazing )
You can use surgical tape or normal sellotape ( don't forget to get rid of most the stickiness off the tape before putting it on top of the nail ) but you don't need to use a straight line guide - I did - not that I manged to put them on straight lol.
Taking the black nail art pen I used one coat and continued onto the other nails ... another 45 second coat
Onto the white nail art pen, I decided to just do triangle or zig-zag ( however they appear to you ) outline instead of filling them in
( read review to find out why )
45 second coat again ... we are finished.
Disclosure : This product was sent to me. I have reviewed this product to my satisfaction. Please read more on this here