P38 type body fillers

Can body fillers be used on bare metal surfaces or should an etching spray be used first to give a better key?

Thanks

Reply to
Alistair Ross
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Fine on most bare metals. Use a coarse abrasive paper to give a better key.

Reply to
Dave Plowman (News)

Always on bare metal, never on the paint. There's no advantage applying filler over etch primer although acid etch won't suffer from solvents because its not a film as such, only an etch.

The main reason is when filler is sprayed over the solvent can seep under the filler softening the paint which will lead to a heavy ring round the repair, (called a fried egg) or poor adhesion.

Stephen.

Reply to
Stephen Hull

Best on a bed of newspaper (and chicken wire if structural) isn't it?

Reply to
Mark W

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