Tacoma Red

or TriphenylPhospsine

There are ways to prevent oxygen inhibition such as increasing material temp (decreases O2 solubility in resin), using a short UV wavelength, physically inhibiting oxygen with say CO2 (not very practical), chemically adding amine groups or 0.1% paraffin wax

Try the seller silvermag in Maine. I'ved purchased many very good quality Whiting capes from him