Gtechniq Multi-Stage Polish - 5L [MMP 5]Multi Stage Polish 5L Why use Gtechniq Multi Stage Polish? Unlike traditional polishes that cut the surface, Gtechniq Marine Multi Stage Polish contains nanoscale alpha alumina particles that reflow the surface. This causes significantly less damage to your boats gelcoat or topcoat. The multi stage technology is not only kinder to gel and topcoats, but also removes surface defects without the need for an abundance of compounds. There are no unsightly