there's no point in cleaning it if you're not going to use a sealer, it'll continue to shed particles until holes show up

many rad shops will boil them out in their cleaning tank and do a proper job of sealing them, won't fail if done right

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