whats the best way to take the wrx sticker of the bootlid,

Hair dyrer and Dental floss.

Heat the sticker up with the hair dryer (don't burn it of course), just use a low heat setting, heat the sticker and slowly peel it off. Use the Dental floss to 'saw' through the back of the sticker if your having trouble. Dental floss is great, as it's strong and won't scratch the duco.

Some citrus based cleaners work well to remove any excess sticker glue.

Don't forget to polish and wax the area after you have removed the sticker. :D

i used hairdryer to remove badge but the glue refused to come off,so i bought some tar and bug remover from halfords and this worked after an hour of hard labour

Cellulose thinners will shift the glue with zero effort in seconds, but only use this if you are 100% sure the panel hasnt been repainted recently :D

Mine just peeled off, dead easy. T-cut, polish after. Fine.

wd40 gets the glue residue off too......... actually quite suprising how many things its good for

Doh ... Sticky stuff remover )made for the job) .... and I suppose it depends if you mean the 3 dimensional badge OR the Vinyl graphics WRX .... You remove a Vinyl with a plastic sharp edge .. there are proper tools for the job available from Mulberry Design and print mail order.