In this instance I would look for an experienced bodyshop, an outlet with good reviews or perhaps someone who is recommended by word of mouth.
You could even ring the Lexus dealer and ask if the can recommend a body shop.
Not all chipsaway franchises are good - it all depends on the skill of the person working on your car,
A family member used chips away a couple of years ago and had to baby sit the guy (took him 3 atempts to get it right) and now the laquar is starting to peel off.