Well,I'm Finally close to putting some color on the Chevelle,I put quarters on(83inches of weld),patch panels on the fenders and fixed 36 years of dings.I want to insure everything is as straight as I can get it,I used a 10 in sanding block on the flats and a 1 in. thick piece of rubber foam but,what can I use on the rounded areas?I sprayed a guide coat of contrasting primer,It looks good to me but,I want to be certain before shoot it.Any tips to check my work ?thanks,jim