How to Remove Yellowing from a BMX Seat

A lot of old school BMX products deteriorate with age. One of the common deterioration found to white BMX seats is yellowing. Here is a Kashimax Handler BMX seat from 1987 that is in perfect condition, except for the yellowing.

The yellowing is caused by mildew growing within the pores of the seat. The best way to remove this without using harsh chemicals and potentially damaging the seat is to leave it hanging in direct sunlight for a few weeks.

I left the seat above for 6 months hanging from my bedroom window where it received direct afternoon sunlight over summer. Here it is now!

The yellowing is completely gone and the seat looks brand new! This seat is going onto my TBC Cobra Quad build.

I hope this tip helps someone else out.