This is what I was thinking, too. But, if you do it at the prep stage, there's no turning back later on. A good way to start the scribe would be to use a set of dividers with one needle extending longer than the other. Let the longer needle follow the inner edge the wheel opening, & the other needle will lightly scribe the body parallel to the opening. Unfortunately, some wheel well trim is not parallel all the way around & gets narrower on the ends. With a little practice you can compensate by tilting the dividers a bit to decrease the distance on each end. Then, deepen the line a bit more by using an X-acto knife. Tape seems like a good idea, too. I use dividers a lot for re-scribing door lines to match the shape of a modified side window.
I have used Chrome Tech, LMK, & Bob's Paint "Kustom Khrome". I've had beautiful results from LMK, other times, specks under the chrome plating. Same thing with Chrome Tech USA, some parts outstanding, others with runs or specks. Didn't care for Kustom Khrome, all of the hubcaps that I sent had tiny pieces of lint or something under the chrome. Plus, no plating where it was attached to the rack with "special tape" My modified bumper came back cracked where it was pushed down on that "special tape." Never again. Whenever possible, I send multiples of a part placed on different parts of the rack to hopefully insure getting one very nice piece. Bumpers & grille on this one plated by Chrome Tech. The hubcaps were plated by LMK.
Chrome Tech again for the bumpers & grille on this one.
Peter, One of my friends that lives in the Netherlands sends his parts to this place. I've seen photos of the parts & they look very nice. VPF FlöhaHeinrich-Heine-Str. 509557 FlöhaDeutschlandemail : firstname.lastname@example.org www.vpfgbr.de
26 or 28 ga. bead wire works for me. I bought a spool @ Hobby Lobby many years ago & still have quite a bit. I'm not a fan of diodes or resistors for fuel filters, mainly because they look like diodes & resistors to me.