[bellguy]

Just finished painting and clear coating my M4 style rear spoiler, just buffed with Farecla G3, needs wiping down and ceramic coating AFTER i fit it tomorrow.
Fit my 2019 440 Sport coupe.

I also have an OE carbon rear spoiler i have painted, brand new which i will put on the for sale list as i prefer the M4 look spoiler.
One for sale has my original invoice from BMW dealer in UK.

[bellguy]

Ready to fit now, HOPE i get chance tomorrow while it's warm, 3M VHB tape in place.

Trying to get this done while painting a helicopter lol.

[weehe126]

Idk wtf I did, but my vhb tape applied m performance spoiler was falling off within a week. Picked up the 3M tape for exterior trim to try again.

[bellguy]

Originally Posted by weehe126

Idk wtf I did, but my vhb tape applied m performance spoiler was falling off within a week. Picked up the 3M tape for exterior trim to try again.

Clay bar the trunk lid before bonding on your spoiler, it sure won't fall off then.

[weehe126]

Originally Posted by bellguy

Clay bar the trunk lid before bonding on your spoiler, it sure won't fall off then.

I used a clay bar and isopropyl alcohol.

[bellguy]

Ouch, strange indeed.

[weehe126]

I think it had more to do with the thickness of the VHB tape. It stuck to the spoiler just fine but didn't seem to stick to the trunk.

[exE36M3]

Try urethane glue. Body shops use that method. Tape is OK. Problem is, the tape shrinks and the adhesive loses it's tack when cold. I struggled with stupid lip spoiler on my old BRZ. used 2x 3M auto tape, 3M 20lb outdoor tape in the same month. Went with urethane glue on the 435i with same spoiler as yours. 2 years later, stuck solid.

[sqwinny]

3m automotive modeling tape does the trick. Only tape that has kept my wing on and allows for removal with heat as well as fishing line

[bellguy]

Finally got it fitted today, went on fine with zero issues.






Weeds grown since my workshop closed for a few weeks.

[bloodqq]

Originally Posted by bellguy

Finally got it fitted today, went on fine with zero issues.






Weeds grown since my workshop closed for a few weeks.

Hello, may I ask you what's the rear diffuser brand do you have?
the diffuser's style is awesome

[bellguy]

Thank you, Diffuser is the OE fitment on this 2019 LCI version.

[bloodqq]

Originally Posted by bellguy

Thank you, Diffuser is the OE fitment on this 2019 LCI version.

I found it! Thank you for your sharing!

[bellguy]

No problem