Cutting an opening in metal wing/fender

[john.r2k]

I have turn signal lamps on my wings but Ive purchased turn signals from similar make car where the shape is slightly different. The connectors are identical and it all works. However on one corner the hole opening is a little too tight so I need to Dremel some of the metal away and make the hole bigger.

The question is, what is the best way to seal the newly exposed metal after dremelling it so that it doesn't start corroding? Some people say touch-up paint but I've seen touch up paint just flake off over time. Ive seen some people put epoxy or some even brush on super glue as that seems to harden and create layer on top. I'm not too fussed about how ugly the patch looks because light unit overlaps and covers the hole. I've used caliper paint in the past that seems to really stick well as it seems to be solvent based. Any suggestions would be much appreciated

[Polly Grigora]

I'm stupid, I'll ask

Is it possible to cut some material off the lamps?

[droopsnoot]

A decent primer followed by top coat (and lacquer, probably, if it's modern paint) shouldn't flake off it it's applied properly. Don't forget that it will need to properly meet (and overlap) the existing paint all the way around - inside and out.

Once that's all dry, I'd probably slather a load of Waxoyl or similar around the hole, again inside and out, before fitting the light unit.

[Chris32345]

droopsnoot said:

A decent primer followed by top coat (and lacquer, probably, if it's modern paint) shouldn't flake off it it's applied properly. Don't forget that it will need to properly meet (and overlap) the existing paint all the way around - inside and out.

Once that's all dry, I'd probably slather a load of Waxoyl or similar around the hole, again inside and out, before fitting the light unit.

This

[john.r2k]

Polly Grigora said:

I'm stupid, I'll ask

Is it possible to cut some material off the lamps?

I did think of that but not possible without damaging the lamp and comprising the unit

[john.r2k]

droopsnoot said:

A decent primer followed by top coat (and lacquer, probably, if it's modern paint) shouldn't flake off it it's applied properly. Don't forget that it will need to properly meet (and overlap) the existing paint all the way around - inside and out.

Once that's all dry, I'd probably slather a load of Waxoyl or similar around the hole, again inside and out, before fitting the light unit.

Thank you, am I able to get a brush on primer? Any particular primer for bare metal?

[Polly Grigora]

john.r2k said:

Polly Grigora said:

I'm stupid, I'll ask

Is it possible to cut some material off the lamps?

I did think of that but not possible without damaging the lamp and comprising the unit

Ok then, had to ask

With you stating lamps on wings I thought they were side repeaters

Any pics?

[paintman]

Steel or ally?
Etch primer will work with both, although is essential for the latter.
U-Pol Acid8 is as good as any.
Buy an aerosol, spray a little into the cap & apply with a brush.
https://u-pol.com/product/coatings/primers/acid8-1...

[Belle427]

If its not visible get yourself a small tin of rustoleum combi colour in black and use that, it's very good and useful on other areas.