Bob, use a proper 'grease and wax remover' rather than any thinner, and use it before sanding so the sanding doesn't grind the junk down into the primer or metal - use the remover again and a tack cloth after sanding to be sure it's really clean and dust free

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics